Mice have been a computing mainstay since pretty close to the dawn of the PC, but they don't offer much in terms of information about the on-screen data you're interacting with. What if they featured physical feedback to tip you off to things like the size of the files you're moving around? Two German students have answered that question likely before you even had a chance to ask. The result is an admittedly cool concept that slows the the roll of your mouse, giving files the feeling weight based on the size of their contents. A "breathing" feature can also clue you in to how much a given file has been used. Also worthy of mention is their DataBot Harddrive concept, which expands and contracts based
