Description: Material: plastic Size: shown on picture How to play: Use a regular dark crayon or marker to draw a line on white paper Turn on the switch on the car button Place the car on top of the drawn line The robot will run automatically If the line ends, the vehicle will continue to drive in the direction of the previous line If the line is too thin, the vehicle may deviate from the line, please make the line thicker the thickness of the line should be one-quarter inch Specification: Lead the way-lead the way on any plane by drawing a line. The robot will follow the line you draw Interaction and entertainment-bring your child39;s fins and magic The perfect gift to surprise your child Increased creativity-promote creative skills, your child draws with pens and increases their concentration. The toy has an optical sensor that can read black lines drawn on white paper. The car is powered by 4 button batteries. Package List: 1 x Inductive Robot Model 1 x pen