I came across this fun idea in a magazine. Take all your broken crayons, peel off the wrappers, and put them in muffin tins. Stick in the oven at 350 for about 5 minutes (it should still be a little clumpy). Let cool completely.
Presto! "Bottle cap" crayons. They are really fun because they draw
multicolored lines. (A few of ours broke- maybe I should melt them a
little longer next time.)