Roboduino is an Arduino compatible micro controller that has some extra features that make it great for anyone making robots. I really like the power buses along side the pwm and analog pins so you can easily plug in a standard servo.
The Roboduino is a Freeduino (Arduino software compatible) microcontroller board designed for robotics. All of its connections have neighboring power buses into which servos and sensors can easily be plugged. Additional headers for power and serial communication are also provided. The kits come with the surface mount parts pre-soldered. Skill level: Beginner to intermediate.
More about the Roboduino
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