I've heard from a couple of people that they have really enjoyed the current exhibit at the Hermitage in Ho-Ho-Kus, N. Closet Archaeology is open from 1 PM - 4 PM Wednesdays through Sundays. The exhibit runs until September 26 so there is time to get there.
The exhibit features the work of fiber artist, Diane Savona who uses found pieces of material and objects in her art (such as lace and clothes pins). This exhibit displays the artist's work in conjunction with the collection of the Hermitage.