Old crayons, peeled, broken into stubs
Muffin tin
Paper muffin cups

Save stub ends of old crayons. Peel and break into pieces. Sort colors into muffin tin or mix colors. Put muffin tin in warm oven turned off. Let melt, then cool. Pop out.

(Muffin tin washed nicely in very hot soapy water.) HINT: Remove from oven when squishy not liquid.