1.Smart Pen Tracing Robot: This magical robot toy is specially designed to move according to the black lines drawn on the paper. Just draw a line on a piece of white paper and enjoy the fun of moving along this line! 2.Easy to Use: just draw a thick line at least 0.3 inches thick, put the intelligent robot on the drawn line, and it will automatically move on the line. 3.Design Principle: The smart pen tracking robot tracks all black lines that are not too thin or too thick with its detection performance and optical sensor function. Let painting learn to make your child have fun! 4.Portable and Lightweight: Due to its travel-friendly size, it is easy to carry it with you when traveling or traveling. This super fun toy is sure to keep your child playing for hours. Let your kids be creative and have fun with the smart pen tracking robot! 5.Suitable for Children: This toy can help children develop critical thinking and motor skills, promote creativity and curiosity, and awaken interest in technology. Light sensors help this robot detect and follow the marker trail automatically. Use the included black marker to draw any patterns or lines you like, and the smart robot will follow where you want it to!cience, Technology, Engineering, Arts, and Mathematics elements are all included in this tiny robot! A good educational toy that helps your kid to learn more knowledge and have fun at the same time! Color: Green, Yellow,White Size: about 7*6*9.5CM Power Supply Mode: 4 Button Batteries 1 * Smart Pen Tracking Robot 4 * Button Battery 1 * Pen