My three year was really interested in the hero stick. At first he was afraid of it, he thought it would hurt, but I explained to him what it was supposed to do and he let me put it on a little scrape that he had gotten on his back. He had been complaining about it hurting a little so I rubbed the hero stick on and a little while later he told me it felt better. I don't know if its a placebo effect, but it seemed to make a pretty big difference in how much he complained. And even if that is the case, it still is making him feel better. I'll definitely be using it for all his bumps and scrapes.