Squeeze out a small pile of shaving cream on an easy-to-clean table top. Add a dollop of washable paint to the top of the shaving cream. You can use one colour or multiple colours for more mixing fun.
After your child finishes making a mess on the table top, you can wipe it away with a damp cloth. If you want to keep a memento of the activity, you can place a piece of paper down on top of the mess and pull it straight up, creating a shaving cream textural stamp print. Lay flat to dry, then display proudly on the fridge for the whole family to admire.