Preheat your oven to 250 degrees Farenheit
Kids can help: place crayon pieces into mold
Fill the mold with whatever colors you want. For Earth Day - use blues and greens.
Only fill molds up about 3/4 of the way. You don't want the wax to spill over into your oven.
Set your mold or tin over a baking sheet to catch any spills
Adults only: Place the tin into the oven. Turn your oven light on, and in about 10 minutes, have the kids come and see. Their crayons are melting into a cool design,. Leave the crayons in for about 15-20 minutes.
Adults only: Set them in a safe place to cool. They cool off pretty fast. I think in about 20-30 minutes, they are ready to peel the wrapper off and use it.
If they are still warm, leave them alone. You don't want tears from using them too early. - I let mine sit overnight.
Kids can help: pop new crayons out of silicone mold and enjoy!