Scientific studies have shown that in the first 3 years of life, children have achieved 80% of the brain cells needed for their entire life, especially in the first 30 days after birth, children have up to 80% of the brain cells compared to 3 months old.

Newborns up to one month old sleep almost all day and night and only wake up to feed (every 2-3 hours). Because they cannot distinguish between day and night, babies can sleep all day and wake up more at night (8-9 hours during the day and about 8 hours at night).

Children who stay up all night, sleep during the day, have difficulty falling asleep, and are often irritable before going to bed are concerns of many parents with young children. The later children stay up, the less likely they are to grow taller and develop mentally. Therefore, parents should pay attention to their children's activities and guide them to go to bed early, sleep on time, and sleep well.