I bought some clear glass ornaments at Hobby Lobby, I believe they were 40% off.
Then I collected some sparkly nail polish.
Take the glass ornament and remove the metal top.
Pour in some nail polish.
Swirl it around until it is fully coated.
You can pour any extra back into the nail polish bottle. Then turn it over so the rest of the excess can slowly drip out and the ornament can dry. I put mine in a egg carton.
Eventually I started using other paints and stuff I had around the house.
I do think the nail polish ones turned out the best.