I first saw this on Funny Days with Mommy and Maddie, and thought I'd give it a try with my little ones. It was fun, but I think I needed to thin the paint out a bit for the buttons to do their magic. This is a really easy one for the younger kiddos.
First I cut regular computer paper in half, then inserted it into a lidded cup. Then I had Miss O and Little Bean dip buttons into the paint and drop them in the jar. Screw the lid on, and let them shake the container. The results are really nice!