Binary Player Robot is a great kids robot building kit by Elenco. Binary Player Robot with programmable, infrared sensor is controlled by black and white patterns on a disk, which are read by an infrared sensor. Particular patterns activate either of two wheels to turn left, right, forward, or pause. These on/off commands illustrate the basic principles of binary coding. To change a movement program, the operator simply creates a new disk pattern. Set your course and explore the fascinating world of Binary Player Robot! Requires 2 AA batteries.