Round up some old crayons. If you want to make galaxy crayons then dark colours work best. Remove all the paper jackets.
Break the crayons into pieces and pop them in muffin tray.
Sprinkle glitter into the tin.
Pop your mold in the oven at 140°C and it took about 5 minutes for the crayons to melt. Watch your crayons all the time and take them out as soon as they have melted.
Take your tray out of the oven and leave to cool. Make sure they have completely set before attempting to remove them from the mold.