Here is another educational robot that can teach you and your kids a thing or two about robotics, technology, and coding. Make-A-Pede is a modular Arduino bot with segmented chassis design and centipede like motion. Each segment is driven using motorized legs and can carry different modules.
You can control the robot from your smartphone over Bluetooth. The Make-A-Pede can also be programmed to move autonomously. You get Arduino module, motor controller, and everything else you need to get started.