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 ...

In this exciting DIY tutorial, learn how to make a marble machine from cardboard with step-by-step guidance. Discover the ...

Rather than just recycle all of our cardboard, I used pieces to create a marble run for my boys. It turned out to be epic fun for the whole family.