Students love, love this lesson. I like it because it's about the creation part of making art, instead of the end-product. It's also about following directions, so this works well for younger students. I had my Kg. class make these circle paintings today using lids as stamps. The main idea is that I put a different color on each table - when the music starts they start stamping and when the music stops they move to the next table and wait for music to start again. I use cups, marker lids, milk lids, caps or any other circle shape that they can hold and stamp easily. Simple, fun, and fast.