I recently stumbled upon a very cool adult toy that I am thinking about purchasing. They are called Airsoft guns and they would be great for target shooting. The neat thing about these guns is that they are not deadly, although they should never be shot at anything other than targets. The BBs, or paintballs if you choose, travel at pretty fast speeds so they are more accurate than other toy guns, but they are more safe than real guns to keep in the house. I would still suggest locking them up, but they seem like a great alternative to the real thing.