Some great healthy snacks to buy are...

A) Small bags of LowFat Popcorn.
B) Pretzels.
C) Ritz Crackers with Cheese.
D) Apples.
E) Grapes, Strawberries, or any other kind of fruit.
F) Peanut butter with Toast.

If any of these fail, just go to the grocery store and look around. Hopefully you will find somthing.