1A novel inductive toy that follows the marking line to move, make children have fun. 2The products include battery slot, light sensor, switch for pen follow car, rear wheel power, pen follow car is powered by two rear wheels. 3It is easy to install the battery. Use a cross screwdriver to unscrew the battery slot screw, insert the button battery (installed according to the positive and negative poles), and push to the switch on. 4Multiple types of induction toys are optional, you can choose according to preference. 5Made of high quality plastic material, safe and ecofriendly, firm and durable.