The Lite Table ($600) from Jellio is a cool looking piece of furniture, inspired by the electric Lite-Brite toy that was released in the late 60s.
The Jellio lite table has one hundred oversized acrylic pegs that light up when positioned over a small light source. Pegs can be changed around to make any design you choose.
Materials: ¼ in. transparent acrylic. Dimensions: 18 W x 18 D x 18 H in.
(Update: Links have been removed from this article to pages that no longer exist. However, you can find plenty of cool products to browse in the GeekAlerts Design Department.)