I read an article on Greener Design which claims they have no made a paint that heals itself. I'm not kidding! You scratch it (or your kids scratch it) and 30 minutes later it's healed! The catch is it only works once, so if you scratch it in the same spot again it won't heal again. But how cool is that? They are basing the science off the way crab shells heal themselves when they are scratched.
Oh the amazing things God has put into nature!