This is an easy cute gift for little ones to give to the friends they *love*.
Gather up all the broken / old crayons...any colours will do although the more red there are, the more like love hearts they will be. Put the pieces in a food bag and smash with a rolling pin until all the large pieces are broken up, and you are left with crumb-like crayons (this is the fun part!)
Divide the "crumbs" between the hearts in a silicon mould like this one. Bake at 150 degrees for 15 mins...open the windows when you do this, as the smell is quite strong!
Allow to cool slightly, then turn out of the mould to cool further.
Present in a cellophane bag and tie up with some red ribbon and cute tag for a lovely homemade Valentine :)