Although we're hoping (and assuming) that this structure had further support added to it to hold a larger and heavier mattress, we're actually kind of digging this idea!
When space is limited you have to get creative and come up with an unorthodox solution. This bed system holds not only two beds, but a bookshelf, toy storage and makes a cool cave for her little one. Check out more details on this Ikea hack over at the aptly named Ikea Hacker.
(Image via: Ikea Hacker)