I have seen these ornaments for the last couple years and I finally took the time to make them. It was fairy simple but, this activity is more for the adults or older children.
What I did:
-Used a butter knife to get crayon shavings
-Kids help put shavings in the ornament
-Used a hair dryer to melt crayon shavings.
The hair dryer does get the ornament hot so children should not hold ornament. If you keep hair dryer in one place for too long the colors will run together and blend and turn dark or even brown. The key is to get it warm enough to melt it just a little bit but not melt to a liquid where it will run all over.
I used glass ornaments so be cautious with glass as it is very breakable.