I had bowls of peeled and broken crayons from the last week of school. I use these to make crayon rewards for my treasure box. ( I am waiting for new silicone molds to go on sale to add to my verity of crayon forms.) I spent this afternoon "baking" my crayons at 300 degrees for 8 minutes. It's stinky and messy so get ready for a fun mess. The kids love them so it is worth it!!