Fortune Magazine names The Spaceframe one of the 25 "Best Products of the Year".Your kids can build a fort, a playhouse, or a grand sculptural monument in your living room. The Spaceframe modular system allows endless possibilities for expression. It is made of a unique polyester material that is completely safe for children, and 100% recyclable. The Spaceframe is a new dimension in building blocks that appeals to children of all ages.