My godson, Henry (who is six), and I get together once a week and play a game we call Switch. We each have a sketchbook, and to start the game we each start drawing. Sometimes we give each other assignments. For example, I might say "draw a picture of an elephant eating popcorn," and without fail, Henry says "draw cats." We draw until one of us says "Switch" and then we pass sketchbooks and draw into the other drawing. When one of us says the drawing is done we either flip to the next page or start an UNO tournament, depending on which way the wind is blowing. Here is some of the evidence: