I have a few tiny items that I've been saving-things that you know aren't trash, but you don't know what to do with them-game pieces, etc. I know I have more squirreled away but at the moment this is all I've got.
I figure lots of people have tiny items laying around. If you do and you'd like to get them out of your house and into a fun I Spy Jar for one of my children, send them my way!
Or just comment with some more ideas of what I could put inside. ;)