Now here's a blast from the past! This is a Horned Rhinocerous Viper, painted on a rock. (granite I think) Rock painting is hilarious good fun, you can do pet portraits in 3D, you can do great big bear paintings on rocks outside, or tiny fridge magnets. One year I painted a bunch of fridge magnet sized rocks, with batman signals, spiderman faces, butterflies, all kinds of stuff. At Halloween I ran out of candy so I offered the kids the fridge magnets. They were a big hit! :)