I am always trying to find ways to upcycle things and seeing how my daughter is only 17 months I always have broken crayons on my hands. These crayons are great because they are larger so my daughter can get a better grip on them. I recommend getting a mold that you will only use to make these crayons because I cant figure out how to get them clean. You can find all sorts of shapes and sizes of Silicone molds on Amazon here

Do it Yourself Rainbow Crayons

Do it Yourself Rainbow Crayons Supplies

Broken crayons
Silicone mold
Knife
Cutting board
Cookie sheet

Do it Yourself Rainbow Crayons Directions

Remove the wrapper from the crayons and chop the crayons into small pieces. Place the pieces into the molds and place on the cookie sheet in a 230 degree oven for 15 minutes. Remove from the oven and let cool.