On a plate, add water just so its completely covered.
Shake the fine glitter all over the water in a light layer.
In a little bowl, dip your finger into the dish soap and touch the middle of the plate to watch the glitter move!
Notes
This only works ONCE. You will need a new plate with new water to do it again! If you are doing it for Elf on the shelf, consider having the kids sprinkle the glitter the morning of instead of prepping it the night before.