Young tech fans can choose from eight robot models. They can construct a humanoid robot equipped with two motors and an ultrasonic sensor, allowing it to react to its surroundings. Alternatively, they can build a robotic crocodile that attacks and snaps when it senses danger. The instructions provide a step-by-step guide on how to build the models, how to program them, and how to control them via Bluetooth using a tablet or smartphone. The accompanying free app already offers seven programs that can immediately set the various robots in motion.