I have a whole box of Unifix cubes if you're interested--good for math manipulatives (adding, subtr, mult, div) and other things as well fractions, etc etc. There were originally 500 cubes in the box, probably missing a few by now :)
I also have some writing paper--not sure how many sheets--lots--but the stack is 1 1/2 inches tall.
Let me know if you're interested in these--it'd be nice to send them together--I think I could fit the paper into the box with the cubes :)
We used them in first grade for helping visualize basic math. Like we would have a pile and they would say "pick up one, now another. That is two. That is addition." I think there was also something about maybe putting our fingers on so many cubes but I don't remember exactly how that worked. Mostly they were just used as something to add and subtract.