All you need are two low BILLY bookcases and a sheet to suspend from the ceiling over the top into a tent-like shape. And voila, the perfect playroom idea! 2. Make your library of dreams Turning ...

Using a few IKEA Billy bookcases she bought off Craigslist, Nozawa created a faux built-in library for a total of $220, or one-fifth of what she would have spent if she wanted a real one.

Each bookcase remains the property of its member/owner. There are shelves devoted to travel, and others to works of science fiction, and so on. The library opened in spring last year, remodeled ...