Take broken, peeled pieces of crayons and place them in mini-muffin tins or silicone baking trays. Place in a 250°F oven until all pieces are evenly melted. This can take somewhere between 20 to 30 minutes. Remove from the oven and let cool in the tins completely. Pop them out when cool. This is a great way to revive old crayons, and make great party favors!