Sphero RVR+ Programmable Robot
As neat as it is to see a ball rolling around on its own and turning on a dime, Sphero’s Bolt is completely self-contained and not upgradeable, and its smooth spherical design means it’s not very good at tackling terrain rougher than carpeting. The $279 Sphero RVR+ is a more advanced programmable robotic platform with tank treads that can tackle lots of different obstacles, plus it’s got a reconfigurable design that allows additional components like sensors or other upgrades to be mounted on top.
