Simple as That has great list of 10 Health Snack Ideas for Kids over at her blog. This one looked really yummy:
Frozen Bananas (or ice cream?!) – These are a hot item at my house. When they are too ripe to eat, I slice them up and freeze them for smoothies […] But I soon noticed little hands digging into the banana bag, and the perfect treat was born. If you are feeling extra ambitious, try pureeing them to make “ice cream.” So refreshing, and fun to add different toppings.
Check out the full post to see the recipe.