Pinterest to me is like an encyclopedia of great ideas! This is one of the cool things i picked up from Pinterest.
Place a piece of paper in a tray. You'll need some paints and marbles for this art.
Drop a few paints of varying colors randomly on the paper.
Put the marbles in.
Let the kiddo twirl the tray away!
Our final masterpiece!
It was waaaaaay too fun. Even i had a ball! :P