Clever Countdown: With its 24 openings, a mini-muffin pan makes a perfect base for a treat-filled Advent calendar. Because the numbered coverings are held on by magnets, you'll be able to bake with the pan again after Christmas.
Bake marbles at 325-350 degrees for 20 minutes (for more cracking-look, bake at 500 degrees for 30 minutes). Remove and carefully drop into pan with ice and water. Glue end caps to finished marble (w/starter rings) to create bracelets, earrings, pendants, ornaments...(unique and great gift idea)