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3 Year Old Baby: Development, Sleep and Milestones

Being a parent is not only providing for the basic physiological needs of the child’s body and caring for him. This is an important responsibility for the formation of a healthy and comprehensively developed personality. It is necessary to be aware of the age characteristics of the child to avoid gross mistakes in the upbringing of the future generation.

The correct comparison of important indicators of the vital activity of your child with the accepted norms for age will allow you to control his development. It is necessary to take into account the individual characteristics of qualitative changes in the body when raising children. The psychophysiological and physiological characteristics of children change greatly with age.

3 Year Baby Development

3 years of age is a turning point in a child’s development. It is characterized by major qualitative changes in many body functions. The intensity of growth processes slows down after 3 years. The child changes a lot in appearance. The main indicators of growth and development reach a certain norm.

Children at the age of 3 remain weakly adaptive and independent but are significantly stronger in terms of physical indicators.

It's The Size of
a Strawberry

Based on length and size of a baby at 10 weeks pregnancy we can compare it to strawberry.

It does not feel like anything yet inside your belly, but structure is there and soon enough it will grow big.

10 Week Baby Size

How Heavy is it?
0.15 oz ~ 4 gr

Bone structure and enlargement of head has made our baby at least to double in weight between week 9 and 10.

Slowly growing baby fetus is now at 4 grams or 0.15 ounces. Keep in mind that every baby weight during pregnancy is slightly different.

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Your Baby is
3.2 CM or 1.25 Inch

It’s hard to measure baby inside your belly during such early development stage.

Overall night is just above one inch or 3 cm. The baby is not measured head to toe yet as it is in round position.

Size week 10

Baby parts development summary at 3 Years Old

The proportions of the body of babies change at 3 years. They stretch and the body becomes narrower visually. It gives the impression of a little more leanness and weight loss. This body type is not final. The transformation of the chest, pelvic bones, and general functional changes in the child’s body continue.

The volume of the skull in a three-year-old baby has grown quite a lot. The planned structural changes in the brain continue. There is an improvement in the work of the central nervous system.

Musculoskeletal systemThe physiological curves of the spine are unstable. The shape of the chest changes, and its longitudinal dimensions increase. The spine is stretched. It is unstable and prone to deformation under improper loads. The ossification of individual elements of the skeleton continues.

Muscles – The neuromuscular system is becoming more mature. The muscle diameter is doubled. Muscle fibers differentiate. Large muscles are ahead of small ones in development. The muscles that provide flexion in the elbow joint and flexors of the hand are well developed.

Respiratory tractThe lumen of the airways is still much narrower than in an adult. The lining of the nose, larynx, trachea, and bronchi is very delicate and vulnerable. Adjustment of breathing and its coordination with movement is still impossible.

Cardiovascular systemThe volume of the chest increases, which contributes to the development and growth of the heart. The cardiovascular system is better adapted to the needs of a growing body. The heart is resilient. The rate of blood flow is greater than that of an adult. Blood pressure 95/58 mm Hg.

CNS activityThe ability to analyze and synthesize environmental influences is developed. The ability to concentrate excitation develops. The processes of excitation and inhibition easily radiate in the cerebral cortex. Children are characterized by increased excitability and fussiness.

Skull bones and teethThe bones that make up the frame of the face are changing. The volume of the skull is 80% of that of an adult skull. The bones of the skull fuse completely and cease to increase greatly in size. The child has 20 milk teeth.

Your Baby Growth at 3 Year

The size of a child of 3 years old varies following age dynamics. Growth compared with 2 years of age has increased by about 9 cm. Growth processes after 3 years are greatly slowed down. There is a strenuously oriented development of qualitative changes in the body.

Weight gain is dynamically stable. The child looks thinner than before. Body weight from 2 to 3 years grows by 4.5 lbs. The more active and mobile the child, the more he will grow in length and gain less weight.

The main indicators of physical development include the circumference of the head and chest. The chest girth of girls at 3 years old is 51 cm, and boys are 52 cm. Head circumference steadily increases by 1 cm. This figure for girls is 49 cm. For boys, it is 50 cm.

3 Year Old Baby Milestones

The age of three is characterized by the active development of the child as a person. There is a development of motor and cognitive skills. The baby no longer associates himself with his mother. He knows that he is a separate person. There is a need for recognition, independence, and self-expression.

Numerous physical achievements at the age of 3 are due to functional and structural transformations in the musculoskeletal and nervous systems. Connections between the brain and motor skills are being established. The child is perfectly oriented in space, but the speed of reaction to the instructions of adults remains weak.

3 years crisis Strong negativism, increased uncontrollability, and stubbornness manifests themselves in a child at 3 years old. This is due to the crisis period in his life. The elements of self-consciousness in a child do not always manifest themselves in successful opposition to others.

The desire to meet the requirements of adults appears with the emergence of independence. The kid loves praise, but at the same time, an internal psychological conflict arises. This is due to the conflict between private interests and public interests.

The intentional nature of actions in the game and creativity The child can create a specific image while playing with the designer or modeling from plasticine. The kid can join the story game by choosing a certain role for himself.

The first conscious drawings appear – faces, the sun, the mother, and geometric shapes. Premeditation, the arbitrariness of actions, and their submission to a certain pattern are just beginning to take shape.

Development of perception The child’s perception is objective at the age of 3. This means that the properties of the object (its shape, color, size) are not separated from the baby from the object itself. The child remembers only the most striking and important characteristics of the object. For example, the grass is green, the lemon is sour, and the ice is cold.

The kid begins to discover and perceive the individual qualities of objects by interacting with them. This is how a variety of properties is comprehended.

Attention Attention control at this age is quite weak. It is in its very early stages. It is still too difficult to redirect the baby’s attention to a specific subject with the help of verbal directions. Switching from object to object now requires repetition.

The active attention of a three-year-old child works for no more than 8 minutes. A feature of attention at this age is its involuntary nature. Sustainability depends on the nature of the activity.

Development of memory and thinking Recognition plays a leading role in the process of memory. The amount of memory directly depends on whether the material is connected into a single whole or scattered. Children can remember two objects using verbal and visual-figurative memory at the beginning of 3 years.

Thinking develops. The child can separate and group objects according to their characteristics. He can analyze the situation and conclude the danger of actions: touching the hot will hurt and so on.

Speech Speech remains situational and dialogical at 3 years of age. It becomes more complex and more extensive. The vocabulary of children who showed early success in the development of speech now reaches 1500 words.

The vocabulary of the child’s speech is changing. The numerical proportion of verbs increases in comparison with nouns. Many adjectives and other parts of speech appear. The length and complexity of the sentences are increasing.

The three-year period marks the beginning of the first and most difficult crisis. There is a struggle with the awareness of one’s own “I” and independent activity and the significance of public opinion. The child develops mentally and physically. The trend of prevalence of the leading need for communication persists.

The child experiences a vital need for recognition and appreciation. He begins to identify himself as a separate person. Playing remains the leading activity.

“The end of the crisis of 3 years will depend on the characteristics of the child’s psyche and your attitude to this period.”

3 Year Old Baby Health

Children 3 years old remain predisposed to inflammatory diseases of the respiratory tract. The reason for this is the narrowness of the airways and the vulnerability of the mucous membranes. The frequency of SARS increases if the child attends preschool. The most common health problems at this age are rhinitis, pharyngitis, purulent tonsillitis, and influenza.

The flu vaccine is still considered effective. It is administered only to those who have not previously received it. Do not stop taking vitamin D3. It is allowed to use multivitamins by age as an additional enrichment of nutrition.

Pay special attention to the development of speech. Toddlers should already be saying simple sentences during this period. Visit a neurologist and speech therapist if this does not happen.

Sleeping Schedules at 3 Year

Frequent refusals to sleep during the day appear at 3 years. You need to try to keep the regime within limits. It is too early to be awake without a day’s rest at this age. The crisis period greatly complicates the process of maintaining the stability of the sleep schedule, but you should not completely abandon the regimen.

Three-year-olds may begin to sleep less consistently. The wake-up time often changes and the schedule shifts from this. Should still have 1 nap a day at this age. It lasts at least 1 hour at lunchtime.

The period of wakefulness should not be longer than 6–6.5 hours, or the baby will be very tired. Sleep at night should normally be uninterrupted. It lasts at least 8-10 hours.

3 Year Old Sleep

The age of three is marked by a diligent struggle for a child’s daytime sleep. Many children resist bedtime too much and parents give up. Attempts to put the child on a day’s rest are not crowned with success and the parents refuse it.

To allow a complete refusal of sleep at this age is not recommended. It is necessary to try to differentiate the activities of the child during the day. Load him more physically in the second half of wakefulness. Restless sleep at night indicates the presence of psychological or physical problems with the health of the child. Children 3 years old should sleep through the night.

3 Year Old Feeding

The child should receive at least 1800 kcal with food at the age of three. He needs a balanced diet with the right ratio of proteins, fats, carbohydrates, trace elements, and vitamins.

No more breastfeeding and formula use by 3 years of age. It is worth paying special attention to the diet. It is not yet recommended to completely switch to general products. This is real only if the parents adhere to the principles of proper nutrition: do not eat heavily salted, fatty, fried, smoked meat.

The diet should be 4 meals. The diet must contain vegetables and fruits, fish and meat, dairy products, vegetable oil, cereals, and pasta. You can add milk and offal. Don’t forget butter and cottage cheese. At 3 years it is allowed to give legumes: peas and beans. Food should be in pieces so that the child learns to chew.

3 Year Old Baby Movements

The development of movements in children of 3 years is associated with the maturation of the brain. Progress depends on the development of brain structures involved in the regulation of movements. Skeletal muscle functionality changes at this age.

Hand movements are improved and stabilized in gaming and household activities. The biodynamics of movements of the upper and lower extremities is characterized by the presence of unnecessary fluctuations and uneven changes in speed. Children 3 years old master many complex motor coordination: swimming, cycling, climbing, and skiing.

Alternate leg movements are well mastered. Toddlers can dance to music and play obstacle sports. Children can throw and catch the ball, grabbing it with their hands. They throw at the target, confidently overcome labyrinths, and jump well on one leg. Improving graphic skills. Improves coordination of vertical movements. Imitation movements are poorly performed.

Safety Around Child

The “I’ll do it myself” period begins at 3 years of age. This partly shifts the responsibility for security. You should not slow down this process, but it is recommended to prepare the child as much as possible. His cognitive activity and variety of movements have no boundaries. Begin to persistently explain to the child what is possible and what is not.

Now the most relevant is the observance of safety when mastering new types of transport and sports equipment. The child rides a bicycle, scooter, balance bike, and rollerblades. Some children master snowboarding, skiing, and even skating. A responsible adult should be nearby at such moments: parents or a coach.

A child receives many injuries in everyday life. Mom’s prohibitions cause an increased interest in the child. Children often get thermal burns, poisoning, cuts, and disobeying the constant “no”.

2 Month Old Sleep

Electrical appliancesKeep all electrical appliances out of reach of children. His observation will allow him to remember how to turn on the device so that the hair dryer or vacuum cleaner “buzzes”. Shut off the room where the baby spends most of his time.

Hot things in the houseIt can be soup on the stove, a cup of hot coffee on the edge of the table, an iron, or a heater. Cook food on the far burners, do not place cups on the edge of the tables. Keep the iron away from your baby’s eyes. Careless handling of such items can greatly harm him.

Bathroom and faucetsThe kid is already able to independently reach the tap with water at the age of 3. He can turn on hot water and get burned. Do not leave your child alone with access to water. He can harm himself or your home.

StairsThe 3 year old walks well and overcomes obstacles. High stairs without railings can be dangerous for a child. Falls from heights are very common among 3 year olds.

On vacationThe natural environment is especially dangerous: wild reservoirs, beaches, forests, and mountains. It is better to avoid a long stay in such places and carefully monitor the child without letting him go even for a minute.

On the playgroundStay close to your child when he plays in the playground. There are many older and more active children nearby who do not control their movements in the game. There is a risk of a careless fall with irreversible consequences.

What To Schedule Next

You can now schedule the next vaccines by age. Such vaccinations are recommended from 4 to 6 years: DTaP, IPV, MMR, Varicella. If there is still no Flu vaccine, then make one.

In children, the spine is unstable at 3 years. You should especially carefully observe the posture of the baby. Schedule a visit with a surgeon, orthopedist, or osteopath if necessary. Try to choose the right height of furniture for your baby. Prolonged improper sitting can provoke the development of scoliosis.

Active socialization should begin at 3 years of age. The separation process is on the rise. The kid is starting to like being outside the parental home more and more. Plan your child’s day so that his communication is as diverse as possible. Attend kindergarten and sports sections.

Parents Tips and Development Speed Up

You should already clearly understand that a separate independent personality is growing in your house, which may have its interests, needs, and habits. Start getting along with each other as early as possible. Do not listen to strangers who impose their principles of education.

  • Teach self-careA child of 3 years old should be able to dress himself, wash his hands, and eat with a spoon and fork. He can clean up toys, go to the toilet, and wipe his face with a napkin. Do not stop his impulses to do something himself.
  • Praise more oftenA child needs the opinion of an adult to form the correct self-esteem. Praise your kid for achievements: designed a house, put together a puzzle, drew dad and mom. Do not praise for ordinary things: for eating, and so on.
  • Choose the right communication tactics in a crisisThe three-year crisis is the most difficult. Show patience. Make concessions to the baby. Agree more. Let’s be independent. Don’t scold the little things. Be silent and listen. Give freedom of choice.

Now the child is at the top of his psychophysical and emotional development. You must help him organize this process correctly and diversify it. Do not leave your child alone with their failures and mistakes. Observe the inclinations of the baby and develop it in this direction.

5 Development speed ups

  1. Development of graphic skills – Often give a pencil or pen in hand. Draw according to the pattern.
  2. The right attitude towards yourself – Learn to take care of yourself and love yourself. Help your child to self-identify.
  3. Development of the imagination – Read stories without pictures and ask to draw the hero of the plot.
  4. Improving speech – Say difficult words, train articulation, and learn poetry. Visit a speech therapist.
  5. Motor activity – Make your baby’s movements more difficult: build labyrinths and obstacles.

Children can start learning the alphabet, and numbers and even solve small problems at the age of three. They can memorize 5-8 colors and count to at least 3. Don’t expect your child to make much progress in learning. Now there is no sustained attention. Try to dilute mental activity with physical activity. It will be easier for the kid to master new knowledge and skills.

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