Leonardo da Vinci's catapult Lego model

Here's something different. You can't buy it as a set, but it's made entirely of original Lego parts that can be purchased at BrickLink.com. Proof that da Vinci's contraption works. His genius celebrated centuries after his time. It's amazing what can be done with Legos. The person who assembled this model did a great job. You can see their website here.