What a keepsake.
Another similar idea I use ALL year long as a wonderful review tool for ANY topic is Study Jams. Tape a "Study Jam" sheet on their back with a topic indicated and let them study and review for a test!
What a perfect way to engage their learning in a hands on way. And students have a ready made study guide to take home.
Both the Cool Compliment and Study Jam sheets are here. Have fun!