The IdeaBox is in the Oak Park (IL) Public Library. It's designed to change completely on a regular basis.
Above left: Blind date with a Book
Above right: Gathering input from patrons on a specific topic
Right: All surfaces painted with blackboard paint
At the Waltham (MA) Public Library is the Pie Room -- so called because it's a weirdly pie-shaped room that was difficult to use for library functions. They created a space that changes every four months, using inexpensive materials. They've had themes including:
The staff cautions that they had to make a real commitment to keep the space fresh, but it's paid off.
Farm scene with cardboard and paper stalls
In the Jungle with paper scenery and tent
Wading pool with stuffed hippos and snake
Jungle with cardboard and paper tree and tree stump stools
Under the Sea with mylar and paper scenery and paper lantern fish