I have 22,000 beads of random ortment. What should I do with them?

Most of the beads are the cheap plastic circles available at any store. They are about the size of a pen in diameter. There are many other varieties, different shapes and sizes as well. I'm crafty, and would love any suggestions! Previously they comprised a beaded curtain I made, but have no use for it now, so I'm not sure what else I could do?