Here is an educational robot that introduces you and your kids to Python, Arduino, and Raspberry Pi. The Spirit Rover is a cute, hackable robot with up to 3 computing processors. It has a Pi unit to handle most of the processing. An Arduino compatible processor may be used with the Pi.
Spirit Rover has 27 RGB lights, computer vision, and high quality components. It has a gripper servo for dragging small objects. There is also a 3-axis accelerometer and a 3-axis gyroscope. Useful kit to start learning how to program.