D had a fascination with trebuchets after watching a history channel special about them a few years ago (cemented by her love for the Lord of the Rings movies...). We found a kit to build a trebuchet for her as a Christmas gift (from our local science museum). Watch out for what they choose to use as weights, though... her dad gave her a bunch of lead shot, which ended up ALL over the floor of the room she was "tossing" in.