I don't care what so called experts say, fruit makes a great snack. You've probably heard its bad since its high in fructose. Yes, that's true. But not high fructose corn syrup, natural god made sugars. And the creator is pretty smart. Fruits have a build in mechanism to help break down and transform those enzymes.
The fiber of the peal has a chemical effect on how we digest the fructose. So it drives me crazy when people go to all the trouble of pealing an apple. Don't! It's not a PB&J sandwich you take the crust off of. Teach your kids to like it with the peel.
Obviously you are not going to eat a banana peel, or an orange rind. But things like apples, pears, peaches, plums... Leave em be.