ZeroN - Levitated Interaction Element by Jinha Lee. What if materials could defy gravity, so that we could leave them suspended in mid-air? ZeroN is a physical and digital interaction element that floats and moves in space by computer-controlled magnetic levitation.
Firewall by Aaron Sherwood. An interactive media installation created in collaboration with Mike Allison. A stretched sheet of spandex acts as a membrane interface sensitive to depth that people can push into and create fire-like visuals and expressively play music. More information available at: http://aaron-sherwood.com/works/firewall
Jinha Lee, from the Tangible Media Group of the MIT Media Lab, in collaboration with Rehmi Post, has been playing with the idea of manipulating real floating objects in 3-D space to create a truly tactile user interface. His prototype is called the ZeroN, and it will drop your jaw when you see it working for the first (and second and third) time.