Thames and Kosmos Robotics Smart Machines: HoverBots Offers a full-color, 60-page step-by-step illustrated manual Program your own robots using 227 building pieces Connects via a wireless Bluetooth connection Can build eight motorized robots Runs on 6 x AA batteries (Not Included) Age: 8+ The Thames and Kosmos Robotics Smart Machines: HoverBots gives kids a simple, fun, and customizable introduction to robotics. You can build eight motorized robots that use a special self-balancing technology to move around. Code programs for your robots using an easy, visual programming app on a tablet or smartphone, which connects to the robots via a wireless Bluetooth connection. The robots use a combination of sensors to balance themselves. A gyroscope sensor is used to detect the angle of the tilt of the vehicle. An accelerometer is a sensor that detects the acceleration, or change in speed, of the vehicle. Together, these two sensors can tell the microcontroller - the robot’s “brain” - if the vehicle is tilting too far forward or backward and moving too fast forward or backward to remain balanced.