what to give kids before swimming?

A. You should feed proper food to the child at least 2 to 2.5 hours before your swimming class because the stomach should not be heavy so if you wanna give proper lunch then at least two or three hours before swimming class otherwise before that if you want to give them you can give liquids which would be good like you can give lemonade milk milkshake Coconut water butter milk these things would be good