After 6 months of age, babies can gradually eat small amounts of watermelon. At the beginning, the watermelon should be mainly crushed, and then gradually transitioned to small pieces of watermelon. After 6 months, babies start to add complementary foods slowly. When adding complementary foods at the beginning, because the digestive system is not yet mature, the gastrointestinal function is still relatively weak, so it is necessary to add rice flour, vegetable puree, fruit puree, etc. First, the baby can start to eat watermelon in small amounts. Therefore, after 6 months, babies can start eating watermelon in small amounts, and parents can use a spoon to scrape some pulp for babies to eat. Parents are advised not to give too much watermelon at one time, should be added from a small spoon, if the baby after eating watermelon appeared bloating, diarrhea, bloody stools, vomiting, rashes and so on, should immediately stop eating watermelon and immediately seek medical treatment.