Anyone remember the Simpson's episode where Bart and Lisa built a huge fort using shipping boxes? Well, perhaps if they had used Bloxes instead, the resulting structure would have lasted longer than one episode. Bloxes are cardboard panels that fold into a shape which gives them amazing strength for their weight. Combine a bunch of Bloxes and you can create platforms, walls, shelves, and tables. Whether you can then go ahead and melt them with a hose, like Bart and Lisa's Boxingham Palace is not clear.

Bloxes.com, via boingboing