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DIY Catapult Kit — scienceSeeds
WebKit for building a working ballista out of quality wood and string Encourages spatial reasoning, logic, engineering skills, an interest in ancient history A recreation of the siege machine invented by the Greeks over 2000 years ago Step-by-step illustrated instructions make building fun and straightforward WebThe ballista was a powerful weapon originally invented by the Greeks over 2000 years ago and widely used by the Romans in battles and sieges. Using the stored energy in twisted … my time at portia logic cube
Amazon.com: EISCO Ballista Catapult Kit - Build Your Own
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