20 Summer Paper Plates Crafts - Spoonful - Great Craft Ideas for the Kids. I really like this use of paper plates, would look great in a window box. I could introduce an element where they could move in the wind- interesting outdoor activity.
Bottle Bank via Martha Stewart: transform a used plastic bottle into a cute piggy bank. Could use same idea to made little containers for kids to store their collections too (use bottle with wider opening and don't make slot)