This is such a great idea, and so simple too! I made a bunch of these at Christmas. I bought the chinese marbles and magnets at Michael's, as well as a 3/4" circle punch out. You can find images and patterns online or you can punch out circles from scrapbook paper. Just make sure you use REALLY good glue. They're cute, inexpensive and easy to make, and who doesn't love a homemade gift!