Featuring an optical sensor, the Penguin Line Following Toy can read any black route and will start running in circles when turned on. This toy helps children learn knowledge about the principles of optical detection and improve the kids' imagination, intelligence, and hand-on ability. It is lightweight, portable, and convenient to play. You deserve it. LINE FOLLOWING FUNCTION: The penguin has an optical sensor that reads the black line drawn on a white piece of paper, and will automatically run on the line that you've drawn. LEARN THROUGH PLAYING: It helps children learn knowledge about the principles of optical detection and improve the kids' imagination, intelligence, and hand-on ability. PERFECT GIFT: Follow line toy will be a special and original gift for your kids and practice their manipulative ability. EASY TO USE: Equipped with an ordinary mark pen and a piece of paper, you can buy them yourself from the store if you run out of them. CONVENIENT TO PLAY: Powered by 4 button batteries. Simply install it directly and enjoy yourself. CREATIVE ROBOT TOY: Lovely and lifelike appearance gives you unique playing experience. We truly believe we make some of the most innovative products in the world, and we want to make sure we back that up with a risk-free ironclad 45 day guarantee. If you don't have a positive experience for ANY reason, we will do WHATEVER it takes to make sure you are 100% satisfied with your purchase. Buying items online can be a daunting task, so we want you to realize that there is absolute ZERO risk in buying something and trying it out. If you don't like it, no hard feelings we'll make it right. We have 24/7/365 Ticket and Email Support. Please contact us if you need assistance. Remember: Shipping usually takes 2-3 weeks read our Shipping for more details!