Mom Always Finds Out received free Crayola products for my consideration. All opinions expressed are my own. My kids love to do Christmas crafts. We usually do at least one ornament craft every year, and this year we tried something new. Crayola Model Magic. This cool clay doesn't need to be baked in an oven to harden. Simply let it air dry until firm, about 24-36 hours. We used our Model Magic clay along with Christmas-shaped cookie ...