Shaving Cream Painting - *M LOVED this... he's not into the whole sensory/finger painting thing so we used brushes, but he had so much fun mixing the colors and seeing the results on different colors of paper. Try this one! :)
Shaving Foam with food colouring = bath fun! kids loved this, said it was more fun than the glow sticks in the bath. I mixed 6 colours in a small muffin tin. They enjoyed finger painting more than using brushes.