Tea (traditional tea) is not suitable for small children. Tea is the water produced by brewing tea leaves in plain water. Although tea contains a variety of chemicals that are beneficial to the human body, it also contains substances that are not good for children, such as caffeine and ellagic acid. Caffeine generally refers to caffeine, is a central nervous system stimulant, the child will appear to enhance the excitability, which will affect the sleep, sleep for small children is very important, poor sleep will affect growth and development. Ellagic acid will hinder the absorption of iron, iron is an important component of the formation of blood red blood cells is also the formation of blood red blood cells essential elements, iron absorption will affect the formation of blood red blood cells. Children are best to choose plain water, plain water is safe and hygienic, and easy to obtain, should drink less or no sugary drinks, it is recommended not to drink tea.