How to Make a Medieval Trebuchet Out of Cardboard : 9 Steps (with Pictures) - Instructables
Introduction:
Grey Company Trebuchet - Trebuchet Triggers
Lisa Riley on Twitter: "My 6 yo #maker made this Da Vinci catapult this weekend. #girlswithtoys #STEAM #STEM @smrtgrls http://t.co/SQh7LexcYf" / Twitter