To appear in American Journal of Physics. Former title: “Little Boxes: The Simplest Demonstration of the Failure of Einstein’s Attempt to Show the Incompleteness of Quantum Theory” A Greenberger, Horne and Zeilinger-type construction is realized in the position properties of three particles whose wave functions are distributed over three two-chambered boxes. The same system is modeled more realistically using three spatially separated, singly ionized hydrogen molecules. I.