Get your child used to foods, which will make life easier for you. Accustom him to whatever will be available on camping trips or in foreign restaurants. Above all, try to get him used to eating cheese. Bread or biscuits with cheese, a tomato or apple, is a perfectly balanced meal, which takes 30 seconds to prepare and another 30 seconds to clear up. It is easily portable, available in any roadside cafe in any western country and conventionally appropriate at any time of day. If you child will happily eat that combination you need never interrupt a days activities in order to think of a meal for him again.

Try not to be too dogmatic about what your children can and can't eat, although the normal rules still apply to avoid choking your child on bones etc. If you let them help themselves whenever they show an interest you will soon discover what they will and what they won't eat.

Children eat when they are hungry, make sure they drink lots of water and milk, offer them plenty of peeled fruit, make an effort to find things that they can eat and should like but you can't do anymore than that. Take some children's multi-vitamins with you on a long trip and relax. [LINK