Line Pen Inductive Toy CarMiraculous Mini Pen Inductive Toy Tank Car Track Model Puzzle Follow Any Line You Draw Gift Funny Toys for Children This is a novelty inductive car, follows the line like magic. If you place the Inductive car Toy somewhere else it would run in circles only until it finds the line. The Children's car Toy has an optical sensor that reads the black line drawn on a white piece of paper. HOT TO PLAY: Use an ordinary dark colored crayon or marker to draw a