You can forget about allen wrenches and magnets altogether—at least if you're in the market for a new shelf—because Meike Harde has come up with a pre-assembled storage unit that unfolds like an accordion to accommodate whatever you need to store.
The hinged zig-zag design of the Stockwerk Shelf's walls allow it to collapse for easy portability. But it also gives the shelf support and stability when unfolded, without the need for extra braces or assembly. It can be as tall or as short as you require, and as your collection of knick-knacks and tchotchkes grows and demands more space, the shelf can easily grow with them—at least until you officially reach hoarder status. [Meike Harde via designboom]