Interior Design

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German Designers Transform Homes Into Elaborate Cat Playgrounds

"Placemaking" for felines.

3XN

The Real Genius of Bloomberg's Plan to Convince You to Take the Stairs

This is nothing like banning soda.

David Hotson Architects

These Houses With Slides in Them Would Make Anyone Giddy

Need to get from the bedroom into the foyer? Try one of these quirky chutes.

Rice+Lipka Architects

Designing Libraries That Encourage Teens to Loiter

An open, airy floor at the New York Public Library offers kids spots to play Wii and Guitar Hero, along with books and homework help.