First, sand and paint a board whatever color you'd like.
Next, draw your shamrock or words.
Then, paint with school glue. I go over my pencil line so once everything is said and done the line doesn't show.
Quick! Shake on the glitter before the glue dries!
I let it sit for a while, then shake off the excess to re-use.
Spray with hairspray to hold the glitter in place.