Line Induction Car And Pen Toy Car, Automatic Induction Road Marking Train, Children's Toy How to play: 1. Use an ordinary dark crayon or marker to draw a line on a piece of white paper. 2. Turn on the on the car button. 3. Place the car of the drawn line. 4. The trolley will automatically go online. 5. If the route ends, the vehicle will continue to drive in the direction followed by the previous route. 6. If the line is too thin, the vehicle may deviate, make the line thicker (the thickness of the line should be one-quarter inch) Features: This is a novel induction car, which moves along the marking line like a. If you place the induction car elsewhere, it will run in circles until it finds a route. The toy has an optical sensor that can read the black lines drawn on white paper. The car is powered by 4 x 13 button batteries. Including markers. The thickness of the line is less than 4mm and more than 10mm, and the line is. The gift will be made for your child. Specification: material: plastic Weight: 180g Travel time: more than 20 minutes Product battery: 1.5V button power supply (included) Packing size: 19x 13.5x 5.2 cm. The package includes: 1x car 1 x pen