Catapult.

So, I watch the History channel and whatnot a lot. Whenever a show comes on about all the awesome things people were able to come up with way back when, I'm always interested. I've always thought the catapult was a pretty nifty idea for a weapon. But I'm much less impressed now. I took Nate to his normal little rock quarry and gave him some spoons to dig with. It took Nate all of two minutes to figure out the concept of a catapult. His spoon got stuck and he looked at the end and just smashed his fist down on it. He said "boom!" And looked like he'd discovered the greatest thing in the world. That kept him entertained for almost an hour. Especially when he used his catapult to keep the dragons away because those sneaky guys are always hiding in the grass.