What food does the child have for acute gastroenteritis? Children with acute gastroenteritis should have a light diet, eat more fresh vegetables and fruits, drink more boiled water, do not eat greasy and fried spicy food, and take semi-liquid as the staple food. Noodles, wonton, dumplings, steamed bread and flower rolls are all ok. Eat more in small quantities, and don't eat too much, which will affect digestion.