(Photo: Hey! Cheese Photography)
HAO Design developed this apartment in Kaohsiung, Taiwan. The furniture is made of enormous LEGO blocks. There are huge minifigs to play with. The walls have LEGO surfaces so that you can build upon and decorate them however you wish. Just make sure that you wear LEGO-proof slippers while inside.
The best feature--and the one that has my 7-year old daughter so excited--is the ball pit table. It's the perfect spot for family meals or family play. You can see more photos of it and other parts of the apartment at Design Boom.