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10 of the smallest homes in the world

By: Bryan Nelson on June 21, 2010, 1 p.m.
A student walks and rolls a Rollit mobile home

Photo: GRIYA GRACE/YouTube

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Rollit Homes

Students at the University of Karlsruhe in Germany designed these chic modular homes, which are built to incorporate multiple uses inside one small living space. The home functions like a mouse in a wheel: The homeowner can change the structure of the house by walking in the center to rotate it. With just a little bit of daily exercise, the unit can be turned to reveal a bed, lounge chair, table, shower, toilet, or a kitchen sink — all in the same space!