The model Crocodile is built from the Lego Wedo 2.0 educational kit. The model uses a combination of a bevel gear with two belts, due to which the crocodile’s mouth opens and closes. A distance sensor is installed inside the crocodile’s mouth, which reacts to objects that appear as a “victim” of the crocodile.
The set includes step-by-step building instructions and an example of program (in Lego Wedo 2.0 environment).