Joseph obsessively breaks his crayons into conveniently sized choking hazards that the babies can't get enough of. I was going to throw all those sad little pieces away and pretend they got lost but instead we melted them in some silicone muffin cups. 300 degrees for 5 minutes, that is all it takes. And my muffin cups are still pristine; I had heard that melting crayons can do horrible things to metal muffin cups, so I think silicone is the key to success. Joseph was transfixed throughout the process--he pretty much thinks I'm an alchemist. I have never been so impressive. I think you could probably get better results if you tried to color-coordinate the crayon scraps. Our color scheme here was entirely kid-directed, so you get what you get.