Interactive Drawing-Sensor Robot Dog

This robot dog stands 10 cm tall with base dimensions of 12.5 x 8.5 cm and weighs 280 g. It relies entirely on optical line-detection and near-field pen-tracking sensors — no cameras, no AI processing, no cloud connection. When placed on a surface with a black line, it follows continuously; when a pen is moved slowly in front, it mirrors the motion in real time. Built-in proximity sensing prevents abrupt stops or collisions. Made from child-safe ABS plastic and powered by 4 x AA batteries, it delivers dependable, screen-free interaction suited for ages 6 and up.