I am not sure that I am on the same level as you are, our store is positive behavior and thd kids earn to go there, we collect no money. We carry things like pencils, erasers, pens, folders, highlighters, hacky sacks, jumpropes, pencil toppers, sharpeners, crayons, key chains, stickers, pencil pouches, wire games, bookmarks, all that kind of stuff.
We order mostly from student supply, fun express, and new this year Max Cowens who is pretty local for us and their prices are good. We use to use Geddes but found their prices are a little high since we are not charging, although they have some really neat stuff! they carry licensed characters like curious george, dr seuss, etc. depends on what kind of price range you are aming for.