I've seen a lot of plans online for building various robots with Lego Mindstorms – but they are all, in my opinion, too complicated. So, I came up with a simple robot. It has two drive wheels, whose motors are attached directly to the brick. And one rear wheel – it doesn't steer, but it doesn't have a tire, so it slides sideways on a slippery floor, allowing the robot to turn. The downside is that the screen is at the bottom. Here are some pictures:
