You can transform those old crayons into little fish crayons like the ones pictured from make it and love it.
All you need is a silicone mold in a fish form or another favorite shape, plus a low temperature oven.
To begin, remove the paper wrappers from the crayon pieces. Making this step easier, you can place the crayons in a bowl of cool water. After about 20 minutes, the wrappers will loosen. Remove the crayons from the bowl and scrape off the remaining paper, or rub them off with paper towels.
Preheat the oven to 300 degrees F or lower.
Place the molds on a baking sheet and then stack the crayon pieces in the molds. You may have to break some of the crayons into smaller pieces so that you can fill the molds nearly to the top. Be sure to leave as little space between the crayons as you can.
Encourage kiddos to create color combinations; like a blue-and-white blend for drawing the sky or a mix of reds and oranges for coloring sunsets. Just close your eyes and let your kids choose colors that will go well together for new imaginative color combos.
Next, bake the crayons for 5 to 8 minutes, or just until they are melted enough to blend the colors and hold them together. Color caution: baking them until liquefied could create just one dark color. Be sure the room is well ventilated whenever crayons are being melted. Overheating wax crayons during the melting process may release unpleasant fumes.
An adult should remove the molds from the oven placing them on a heat-resistant surface. Let them cool for 30 to 60 minutes depending on the size of the mold. Remove the crayons from the molds. If they do not pop out easily, tap them gently on the counter.