For my oldest, who called me from New York this morning
What you will need:
Clear glass ornaments
Take the top off of the ornament and drop in bits of crayon - not too many. Think about color mixing for best results (This is where I hope you listened to your art teacher and remember how colors mix!)
Put the top back on and hold by the top. Apply heat to the crayons until they begin to melt.
Spin or twirl the ornament to allow the crayon to spread around the ornament. Careful! It does get hot!