There are plenty of fun robots available on the market. Not all of them are capable of negotiating rough terrain easily though. The SDR Center Pivot Robot is different. It has a clever chassis that allows it to move over objects and uneven terrain.
The kit comes with 10-inch pneumatic wheels, a custom aluminum base with center pivot, 4 IG52 136 RPM gear motors, 1 x Sabertooth Dual 25A motor driver, and a 2.4GHz transmitter/receiver. The robot has a max speed of 4mph with payload capacity of 50lbs.