Meet the EZ-Robot Roli Rover: an educational robot you can upgrade with ez-Bits. It has 13 female ez-bit connections for you to get started. The robot features 2 motors, a 7.4v LiPo battery, and a camera for vision tracking. Roli can negotiate any terrain. The robot can interact with objects, colors, faces, and motion. It can carry things for you. In fact, it has a drink holder to bring you a cool soda.
The Roli robot has compact grippers, allowing it to interact with light objects. It has open source 3D printable parts and mobile control. The above video shows what you get.