We've all dreamed of building our own robot... for whatever perverse reasons. Luckily, Lego is here to fulfill our fantasy. The Lego Mindstorms NXT system ($250; available in Aug.) lets you easily build and program robots. The heart of the new system is the NXT brick, a 32-bit Lego microprocessor that can be programmed using a Mac or PC. After you build your robot creation, you hop on your computer to program it with some easy-to-use included software. You then transfer the programs to your invention using Bluetooth or USB 2.0, and once programmed, your robot "takes on a life of its own, fully autonomous from the computer." Look out, kitty. [via]