Robotic cat you can build. Petoi Robo Cat Nybble is an open-source robotic cat. Designed for educators, students, and builders. This DIY project comes with wood cutouts, sensors, and hardware. It uses Arduino IDE software to input and process commands. Robo Cat also includes sensors to keep it upright regardless of the surface its on and thanks to the ultrasonic sensors in its eyes. Robo Cat can detect its surroundings. Petoi Robo Car Nybble is currently priced at $279. Would you buy this robotic cat?