An Apple a Day Keeps the Doctor Away, a famous phrase that all we know. An Apple is more nutritious food than the others. Apple juice is a nutritious drink that can provide phytochemicals found in apples. It is better you can serve apple juice in some limits.
All the digestive juices are more acidic than any food or drink. The apple juice is carrying with [u]vitamin C,[/u] orange juice that supplies vitamin C is probably a better choice for your kids.
Child nutrition specialist advise that it is not advisable to take the too many juices between meals so that the child could not take adequate nutrition at meals. Milk, or a calcium-based alternative for those who can't drink it, should be emphasized at meals. I think apple juice is good if we can give it in certain doses as suggested by the doctor.