Getting your kids started with coding and robotics is going to be easier when you have a decent robot like the LocoRobo around. Powered by Atmel AVR processors, this robot has 6 sensors (ultrasonic, sound, temperature, microphone, gyroscope, and accelerometer) and lets you use your smartphone or tablet to program it.
LocoRobo is compatible with iOS and Android devices. It has a rechargeable battery and programmable LED lights. More information is available here.