(1) You’ve heard of player pianos . . . how about a player violin?

Cost: $17,000

(2)  A Deligh Table

The table, which allows you to create nifty visual effects by simply touching it, uses a rather simple, but elegantly implemented technique. An opaque liquid is sandwiched between a transparent plastic film and a light source. When touched, the liquid moves away and lets the light shine through.  Cost: $2,270.00.

It looks better in video: