Indoor forts for kids (and adults) just got a whole lot easier – and more fun. Made from recycled cardboard, these lay flat for storage, but can be folded into lego-like blocks for easy stacking. But the genius is the ‘mortar’ that holds the blocks together, and the easy-on roofs. Take a look – and be a part of the kick starter program if you like what you see.
This is a possible step towards an outdoor building system for reusable small buildings as well.