It may sound like a simple activity but it is actually quite satisfying to paint deck with water :) (I put a small amount of water in the bucket). It also helps with gross and fine motor development. Kitten did not spend that much time doing it but I think only because it was cold and she was wearing mittens. She was very excited when I showed her how to paint with a brush and couldn't wait to try it herself. We'll try it again when it's hot outside!