Tips : Melted crayon
Gather up all of your broken crayons
cut them into small pieces
fill the paper cup (alternative : aluminium foil) with an inch thick crayon.
use hot gun to melt the crayon
(alternative) use oven to bake for 10mins / until the wax is melted
Allow the crayon cool and harden ...
cut out the crayons and they're ready to use.