Seige Machines? I think they are just what we needed here at the house! Seriously, I love finding clay balls all up and down the hall from the most recent battle or flinging contest! We have absolutely LOVED these machines!
The Catapult, I had Roger help them put it together and of course, it was easy breezey... the Catapult is my favorite, mainly because it can fling acorns, mini marshmallows, and little army men. Yes, you name it, it has flown down my hall via the Catapult. The Trebuchet has to have more weight on it, so we were not as successful with other things using it.