The toymaker is using discarded fishing nets and engine oil as ingredients in the 300 million “tires” it makes per year.

Mechanum wheels are great, but you have to have them perfectly alined or they come across a little clunky, giving your robot a herky-jerky movement. Robotics educator and supreme LEGO builder ...

CD wheels, and fabricating the rest of the rover are good examples if you take on a LEGO build in the future.