More to explore:
Homemade stamps for kids! Bottle tops + foam stickers = instant stamps!
bottle tops, glue on foam stickers. Instant stamps. I'm doing something similar to this... but I was going to write letters on the bottle caps so that students could arrange them into words... but stamps sound fun!
Make Your Own Bottle Top Stamps...simply save your plastic bottle caps, glue on foam stickers and voila, instant stamps!