This Cozmo is a fully functional robot that comes with a working charger, three working cubes, and a product information guide. (See the video to watch Cozmo in action!) With the Cozmo app, Cozmo can stack and knock down cubes, play exciting games with people, recognize people and call them by their names, and explore the environment using remote control technology. Cozmo is rechargeable with the provided charging dock, but the cubes need E90 batteries to work. One cube comes with a charged E90 battery, but the other two cubes need new E90 batteries.