I put some paint into a pie tin and with just one quick model to show L how the thing was done, she was off and running (driving?) and making some really visually interesting art in the process.
She did a pretty fantastic job of covering the entire piece of cardboard with the wheel prints, and I now have a pretty bitchin' piece of artwork that I plan to frame (seriously!) and hang in our living room.
What unconventional art tools have your kiddos tried?