One of my go-to art activities are watercolor and tempera cakes. For the younger children, I wet the cakes ahead of time to make it easier for the children to get paint onto their brushes and to eliminate spills. Set up this way, watercolor painting is usually an activity the children can do independently without assistance.
But then one child picked up a tray, turned it upside down, and pushed out the paint. Just as I was about to say, “The paint needs to stay in the tray”, I decided to say nothing and wait to see what her plan was. She moved the disc of paint around on the paper, making some stripes and marks, and then pressed it down, forming circles around the paper.