Here is another modular robot that can keep your kids entertained and teach them the basics of coding. Amigo One has a low profile chassis to fit under your furniture. It has 4 omnidirectional wheels to move in all directions. You can use Amigo One to deliver small items, engage your pets, and play games.
The robot comes with independent modules that connect to the base magnetically. The project is live on Kickstarter at this time. Expected to ship in October.