Spray a clean, dry mini-muffin tin with vegetable oil cooking spray.
Spread the oil around with your fingers to ensure that all the crevices are covered.
Place your crayon stubs into the tin and bake until they're melted together. Take the tin out of the oven to cool.
Flex the tin slightly to loosen the chunky crayons from the side.
Flip the tin over on your counter. The cooled crayons should pop right out.
Wipe off any oily residue with a paper towel.
Place your crayon stubs into the tin and bake until they're melted together. Take the tin out of the oven to cool.
Wait until the tin is cool enough to handle. Place the entire tin into the freezer.
Remove the tin from the freezer after it's been in there at least 30 minutes. The freezer should cause the wax to contract and pull away from the sides of the tin.
Flex the tin to loosen the chunky crayons.
Flip the tin over on your counter. The cooled crayons should pop right out.