“Every parent has questions about their child’s development.
This book is the warmest and most accurate answer to that question.”
“From worried parents to trusting and waiting parents.”

From newborns to elementary school students, there are countless changes and abnormalities encountered during the growth process.
"Tok Tok! Our Child's Development Center" presents a practical guide to supporting children's healthy growth, focusing on 100 key pieces of information parents must know during this period.
It covers a wide range of topics, from the five major developmental areas of gross motor skills, fine motor skills, language, cognition, and sociality, to premature infant care, parenting methods based on temperament, the truth about sitting in a W-shape, how to use digital media, and how to respond to developmental disabilities. It also includes only the most frequently asked questions from actual clinics.
Professor Im Sin-yeong, a pediatric rehabilitation specialist with 30 years of clinical experience and a mother of two, explains in a way that parents can easily understand based on her professional knowledge and extensive parenting experience.
This book is a reliable guide not only for parents who want to accurately understand and practically respond to their children's development, but also for childcare workers, therapists, and medical professionals.

Causes of language delay
Language development goes beyond simple communication and is deeply connected to a child's social skills, eye contact, facial expressions, and nonverbal elements such as gestures.
There are many reasons why a child may not speak, and while it may simply be a delay in language development, it could also be an early sign of a learning disability such as intellectual disability, autism spectrum disorder, or dyslexia.
Moreover, language development is not just about being able to speak well, but also includes the social appropriateness of conversation.
So, even if someone speaks quickly and accurately, if they have trouble understanding other people's emotions or nonverbal cues, they may have a condition such as autism spectrum disorder.
It is very important to accurately identify the cause of language delay and provide appropriate treatment and support based on the cause.
--- p.102

A tip for parents! Do this in these situations!
Here are some practical ways to support language development:
1.
Make sure your child can point to their eyes, nose, and mouth.
By 24 months, your child should know basic body parts.
2.
Ask your child what their favorite animal or cartoon character is.
There are a few things you should know by 24 months.
3.
At 36 months, check to see if your child understands numbers and colors.
4.
Make sure your child responds when you call his or her name.
However, this alone cannot completely rule out hearing loss.
5.
If you are concerned about language development, consult a pediatrician or pediatric rehabilitation specialist.
I don't recommend just waiting.
Parents' active involvement greatly contributes to a child's language development! For example, small actions like making eye contact and talking with your child every day or praising the words they pronounce can make a big difference.
--- p.106

Is goat milk most similar to breast milk? Some advertisements claim that goat milk is the most similar to breast milk, but a comparison of nutritional properties proves otherwise.
Breast milk is 60-70% whey protein, but goat's milk is only 20% whey protein.
Additionally, oligosaccharides, which are abundant in breast milk, are present at very low levels in goat milk, which means that the supply of prebiotics, which are important for baby gut health, may be limited.
--- p.209

A pretty head is one that is neither abnormally small nor large, is symmetrical on both sides, and is slightly shorter from side to side than from front to back.
This is a prerequisite for a balanced head.
So, let's find out what types of abnormally deformed skulls there are.
- Flat head: A head with one side flattened at the front or back.
- Brachycephalic: A head that is flat on both sides and elongated from side to side.
- Long head: A head that is long from front to back and flat on the left and right.
- Cone head: This refers to a head shape with an unusually high forehead.
These head conditions are rare, with plagiocephaly and brachycephaly each occurring in about 1% of cases.
Since the practice of putting babies to sleep on their backs began in 1992 to prevent sudden infant death syndrome, a sevenfold increase in flat heads has been reported.
Both plagiocephaly and brachycephaly are usually considered cosmetic problems and do not significantly affect the baby's brain development.
However, if severe, you should consult a doctor to check for craniosynostosis.
You may need to seek professional advice in the following cases:
- When the head shape is noticeably asymmetrical or becomes increasingly asymmetrical
- When the baby turns his head only in one direction and his movements are limited
--- p.232

Buttock dimples are a cute cosmetic feature, much like dimples on the face, but in rare cases they can indicate health problems related to the spinal cord or spine.
Further evaluation is necessary, especially if the dimple is deep or is accompanied by surrounding features such as hair or spots.
We'll also show you how to tell the difference between safe and unsafe dimples.
--- p.265

If your neck gets sore when you do terminal time, try the following:
- Posture correction: During tummy time, guide your child's gaze in the opposite direction.
It can be helpful to use toys or sounds to attract your child's interest.
It is also effective to turn the head to the opposite side when laying the child down.
- Gentle Stretching: Gently stretch your neck muscles under the guidance of a professional.
Yes.
- Environmental adjustment: Parents should be close by to ensure the child feels safe during tummy time.
Yes.
- Adjust the terminal time: Start with a short terminal time and gradually increase it.
--- p.289

My knees are popping! Are you okay?
You may hear a popping sound not only in your fingers but also in your knees.
In particular, you may hear a clicking sound from your knees when bending and straightening them or when getting up after sitting for a long time.
And this sound is usually caused by the normal bubble formation process.
However, if you have pain with a sound, swelling or inflammation in your knee, or discomfort when walking, you may have arthritis, cartilage damage, etc., so it is recommended that you get examined by an orthopedic surgeon or rehabilitation medicine specialist.
--- p.293

Want to know why your baby rolls over to only one side?
This can happen when one side of the muscle is stronger or the other side is weaker.
In this case, you need to induce a flip to the opposite side.
Place your baby's favorite toy on a side where he or she is less likely to tip it over, and then say, "Come here!" to arouse his or her interest.
You may want to increase the amount of time they have free time to play on the floor.
If your baby always turns his head to the right and feels comfortable in that direction, you may suspect muscular torticollis.
Don't worry too much and contact a pediatrician or rehabilitation medicine specialist, as you may need a specialist's diagnosis and treatment.
--- p.296

While a unique four-legged crawling pattern may reflect your baby's individual developmental pattern, special observation is needed in the following cases:
For example, if you use only one leg or arm predominantly, or if your movements are very asymmetrical, a neurological problem may be suspected.
Additionally, if you experience persistent discomfort during the movement process or are unable to move from place to place at all, you may need to consult a professional.
--- p.300

The important thing about sitting in a W-shape is the foreground.
Anterior cruciate ligament refers to the angle at which the neck of the femur leans forward from the ground.
Simply put, think of the femur as looking like a stick tilted forward.
For example, if you imagine lifting your leg to kick a ball, it's easy to understand how this angle works.
--- p.303

Infantile spasms are a condition that begins before 12 months of age, and are caused by abnormal signals in the baby's brain, resulting in sudden convulsions in which the body bends or straightens.
It may seem like a simple surprise reaction, but early diagnosis is necessary.
It is characterized by brief, sudden muscle contractions, in which the baby leans forward or suddenly extends or bends the arms and legs.
West syndrome is a condition characterized by the concurrent presence of infantile spasms, developmental delay, and high-amplitude negative electroencephalograms (hysarry thmia).
It usually develops between 4 and 8 months of age and may be accompanied by developmental problems.
The syndrome was first reported in 1841 by the British physician William James West.
Characteristic high-amplitude anomalous EEGs are highly irregular and chaotic brain wave patterns, and early diagnosis and treatment are important.

--- p.356