I've been saving frozen juice lids for a few months. I only buy frozen orange juice for backup so it took me a while to accumulate more than twenty. I originally was saving them for some sort of picture game for Kate, but I didn't really have the images readily available, so I decided to use them to help learn numbers instead.I printed off two sets of these numbers in black and white, and colored them with colored pencil one night while watching something on tv. After that I drew circles around them with a small glass and a pencil and then cut them out and used a regular school gluestick to paste them onto the clean lids.
Using magnetic wands purchased at a local children's store for three dollars each, we have had a great time playing matching with the numbers and then even more fun just playing with the magnetic wand and lids on their own. There really is a lot you can do with lids and magnetic wands. I've already started saving some more for future inspiration.