Transform basic cardboard into an innovative 5-speed gearbox with this exciting DIY project! If you’ve ever wondered how gear systems work or wanted to build your own functioning gearbox from scratch, ...

Transform cardboard into an exciting, giant marble run with a unique device that transfers marbles from a bag to a box! This step-by-step tutorial shows how to design and build a smooth ...

Cardboard beds are one of the Olympics' latest green innovations. But not all the athletes are fans.