[More like forty, but zaShunina doesn't tell her that. He doesn't answer the question at all, in fact, simply continuing to smile.]

It is a tesseract. [His free hand reaches out to take her by the wrist and turn her palm upward, dropping the paper object into her open palm.] A four-dimensional cube. It is a very simple anisotropic shape.

Turn it in your hands. Feel it. What do you observe?

[She would feel something very different than the image her eyes can see. Cubes connecting with cubes at ninety-degree angles but never appearing as more than one singular box that seems to morph when rotated.]