This is a fun craft I remember doing with my mom when we were little, and I have been looking forward to doing with Jack for a while. It does require an oven, so it's not totally toddler friendly, but there are quite a few opportunities for your little one to get involved.
Like I would imagine is the case for most kids, Jack has a tendency to break his crayons when he colors, and instead of throwing away those little bits of crayon, I have been saving them in a little Tupperware container since he first tried his hand at coloring.
First you will have to remove the paper from the crayons...this is the tedious part, but I found that if I got it started, Jack had a blast ripping the paper the rest of the off. We then started sorting our crayons into a muffin tin (don't expect to reuse this tin! You might want to get a disposable one), and for us, sorting meant just throwing them in. Bigger kids can go crazy here and sort by color family, or theme...such as red, white, and blue for 4th of July or something.
Directions I found online said to bake them at 200 degrees for 10 minutes, but I found that our crayons needed much longer than that. More like 25 minutes, checking them frequently. I had a slight mishap in which I underestimated just how RUNNY melted wax would be and sloshed the crayons when I removed the tray, but really...no harm done! But that does explain why there are no pictures of the next step...I was cleaning wax out of my very hot oven.
You are all surprised...I know, I know! Me? Make a mess? NO!
ANYWAY...Once your crayons are melted, pull your tray out of the oven. I set ours in the refrigerator to cool for a while. After the wax hardened, I simply turned my tray over and knocked on the bottom of each section with my knuckles, and the crayons popped right out.