I have been teaching the kids how to mix secondary colors. Last week we did this project... I sprayed shaving creme into three ziplock bags, then added yellow/blue, blue/red, and yellow/red. The kids squished them to make green, purple, and orange.After the colors were mixed we dumped the shaving creme into a pan and swirled it around. Next the kids took white card stock and laid it on the mixture.I then wiped the creme off with a napkin, and this is the finished product.