When I was 10, some kids in our area wouldn't let my friend and I join their club. They built a fort and would huck stuff at us when we walked by. My dad was a welder and when I was 7, we built a mini catapult together, so we brought we to the fort and heaved an old lawnmower engine into it and fired it at the fort when no-one was around. took a few tries, but once we got the trajectory correct, we utterly annihilated that fort. My only regret is we broke the preload spring on the catapult (it used an old strut spring since the whole thing was made of metal).
