Materials: Cardboard, glue, magnets, urethane.
I made these using ground up cardboard boxes. To shape them, I experimented with a clay mold, but found it best to use a dog-bone shaped cookie cutter. I lined the cutter with plastic wrap and then filled it with a glue and cardboard mixture.
When they were dry, I sanded the backs smooth, and glued on neodymium iron-boron magnets. Finally I painted them with two coats of urethane sealer. The sealer step brings out the “grain” and the rich color of the cardboard, and gives these a bit of water resistance.
