The T-Rex is built from the Lego Wedo 2.0 educational kit. The movement occurs due to the operation of a combination of three gears: spur, bevel and belt. Using the keys, you can adjust the movement of the Tyrannosaurus, and you can also add the sound effect of a menacing roar!
The set includes step-by-step building instruction and an example of program (in Lego Wedo 2.0 environment).