Some combinations of material and machine just don't sound right, such as a wooden airplane the size of a jetliner (the Spruce Goose) or an airship full of extremely flammable gas (the Hindenburg).

Learn how to create your own functional cardboard crossbow in this detailed DIY tutorial. Using recycled materials, cardboard ...

Discover how to build a fully functional, remote-controlled limousine out of cardboard in this step-by-step tutorial. Watch ...