For storing and set up with stamps, stickers and other multiple, small pieces, your sanity can be preserved by storing items by theme or project within a larger box of similar items.
If you keep using the same objects they will learn, by rote, how to fit them into a box, like a shoe box. I'm a big believer in transparent boxes with everyone, but especially with people functioning within ACL 4 Low. They are likely to ignore objects placed in non-transparent boxes.