This inductive robot toy features automatic line following via its optical sensor, light music, and the ability to run in circles until it locates a marker line. It can improve color recognition and hands-on ability, and is made of durable ABS material. The set includes a robot model, pen, white paper, and manual. Power it with 4 included button batteries. This toy can be reused and doubles as home decoration or a collectible. Features: - Can be used repeatedly, with light music. - If you place the Inductive robot somewhere else it would run in circles until it finds the line. - If the line finished, the vehicle will continue in the direction followed from the previous line. - If the line is too thin, the vehicle may stray off the line, please make the line thicker. - This is a novelty inductive toy, which follows the marker line like magic. With an optical sensor, can automatically run following the line drawn. - Not only for play, but also can be placed at home as the decorations and collection. It helps improve children's ability of color recognization, hands-on ability. Specifications: Material: ABS Size: 6.7*5*9cm Power by: 4*button batteries (included) Package included: 1 x Robot Model 1 x Pen 1 x White Paper 1 x Manual Notes: 1. Manual measuring, please allow 1 ~ 3mm error,thank you. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture.