hasanabbas1987 writes "Touchscreens have been with us for quite some time now and we have seen all kinds of them: resistive touch, capacitive, multi-touch, etc. However, Nokia's research lab in Tampere, Finland has developed a rather unique kind of touchscreen: a touchscreen made of ice. Well, to be honest, it's not really a touchscreen for everyday use, nor is it very portable, as the rig includes a projector and some infrared cameras (PDF) which are connected to a computer, but after all it's a touchscreen made out of ice and that is quite remarkable. Nokia says this 'playful experiment' reveals that interactive touch displays can be built anywhere, and we are very sure that Mr. Freeze from Batman will be highly interested in the project."