Meet Amigo One: a modular robot with omni wheels that can keep your kids entertained and teach them a thing or two about programming. It has a 4.5cm chassis, so you can easily drive the robot under your sofa. Amigo One is driven by 4 omni-directional wheels and can rotate in all directions. It comes with independent modules with magnetic connection.
This robot is built on Arduino Mega 2560. Expected to ship in October. You can find out more about it here.