First, turn the oven to 420F/200'C

Then, find some silicone cupcake molds and old pieces of crayons (or new ones if you have crayons sticking out of your ears ;o)
After that, you take the wrappers off, break them (the crayons, not the wrappers) into pieces and fill the molds with them. Heap it up a bit.

After 10 minutes in the oven you take them out, as you can see I didn't use enough crayons in some of the molds. Leave them to cool down for about an hour before you take them out. I left them to cool for a bit longer after that yet too.

Here they are, our own "fancy" crayons. Or as brother 4 says "I can colour with Bob now".