Remembering my sister telling me of this project a couple years ago and being newly reminded by Nicola, I decided get my Valentine crafty groove on and use up some old, unhappy crayons in the process. It's easy -peasy.
Break and de-paper crayons. Oh, your kids have already done that to all their crayons? Even better.
Fill (not all the way) mini-muffin pan (hearts not required, but very cute) with broken pieces any old way you like.
Melt at 275 for 8-10 minutes. Remove and cool to room temperature. Place pan in freezer for 2 to 3 minutes then pop out to cool completely.
And a lovely reminder of what a little time and love can do for some broken discarded bits.