Take off the tops from your clear plastic balls. Set aside for later.
If you're using glitter, add a small spoonful into the ornament ball, approximately 1 tsp.
Slowly pour a small amount of paint into the ball. It doesn't matter which color you start with.
Turn the ball slightly and add a second color.
Repeat steps 3 & 4, until all the colors you want to use are in the ornament ball.
Turn and twist the clear plastic ball carefully, until the ball is completely coated on the inside, and you can no longer see through it. Add more paint if you need to!
Turn it upside down in a disposable cup, so that the excess paint runs out. Leave it overnight.
Turn it back over so that the hole faces up, and allow it to dry thoroughly -- approximately another 24 hours.
Replace the hanging top, and ornament hanger or ribbon.
Add stickers to the ball, as a final touch.