Collect your broken crayons and place them in the silicone baking tray. (Your mother will be happy that you are finally getting rid of the broken crayons :-)
Under your mother's watchful supervision, bake in the oven at 230 degrees. We have a convection oven, so we baked for 10 minutes. Adjust your baking time if you have a regular oven.
(Warning: The unbroken crayons in the above photo were purchased for 25 cents a box under the guise of "school supplies". They were broken and placed in the silicone baking tray without my knowledge or consent. Do not be fooled by your own child when shopping for school supplies -- bring a list!)
Let your mother know that this was worth her time.
Go collect more broken crayons and repeat!