What food does the child eat 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, jiaozi, steamed bread and flower rolls are all acceptable. Eat a little more, not too much, it will affect digestion.