There is no such thing as the fastest way for babies to grow taller. If you want your baby to grow taller, you need to make sure that your baby has enough sleep and adequate nutrition, and also pay attention to taking your baby to sunbathe properly. 1. Enough sleep: babies will secrete growth hormones during sleep, so ensuring enough sleep can promote the growth of babies. 2. Adequate nutrition: the growth and development of infants can not be separated from the nutrients, want to let the baby grow taller, we have to ensure that the baby has enough nutrients, such as breast milk, vitamins and so on. 3. Appropriate sun exposure: sun exposure helps the synthesis of vitamin D, vitamin D can promote the absorption of calcium, so if you want to let the baby grow taller, to take the baby appropriate sun exposure. But avoid sunbathing in the midday when the light is strong, to prevent sunburn skin. In addition to sleep, nutrition and sun exposure, there is also a relationship between infant growth and genetic factors. If an infant has growth retardation, it is recommended that he or she go to the hospital in a timely manner.