I grew up with those, did they come in a big, blue box, and ask all sort of elementary school questions with the answer on the corner or the back? i have the whole set, using it for school when i was a tyke.
hey, i picked some of those up a couple years ago. here's some pics of mine for those that are wondering:
my box is ripped, but they're fairly worthless, so it's no big loss. they're just kinda neat. i'm not sure how many there are in total, or if mine are complete, but i'm looking at several hundred. i even just found a sheet of temporary tattoos from Super Mario World in them!!
one's missing and they're wrinkled, but that's cool. i never knew those were in there until just now.