Remote control LEGO vehicles can do some amazing stuff. Can they climb walls? You have to design them specifically for the task. In this video, the guys at Brick Technology start small, but then attempt to climb ever taller walls. For each LEGO wall, they begin with failure. But we see how they quickly identify the problem, and redesign the vehicle to fix it. Bigger wheels. Lower axles. Greater length. Adjustable weigh distribution. Success comes only when the vehicle climbs to the top and manages to land on the other side without toppling over, and be able to drive away. For each extra layer in the wall, the vehicle gets bigger and more elaborate, until the later models look more like robots than vehicles. The last version, challenged to climb a wall 40 bricks tall, might remind you of a medieval war machine. They had to pull out all the stops for that one! -via Geeks Are Sexy