The normal sleep time for a 3-5 year old baby should be kept at 12-14 hours, usually starting to sleep at 8:00 pm at night and getting up at 7:00 am the next morning, which is 11 hours of sleep. During the daytime, when they take a nap at noon, they should usually make up about 2 hours of sleep, which is enough in total. If the baby’s sleep time can be guaranteed, it will help the baby’s brain and other parts of the body to develop. Babies who do not get enough sleep should check the cause. The most common cause is caused by calcium deficiency. It is recommended to supplement your baby with cod liver oil and calcium gluconate oral solution, and also take your baby out to the sun more often to promote the absorption of calcium. The baby’s diet should also be paid attention to, it should be nutritious, easy to digest and absorb, you can eat more food with high calcium content, such as sesame paste, nori, fish, shrimp, milk and so on.