CapStones and ZebraWidgets: Sensing Stacks of Building Blocks, Dials and Sliders on Capacitive Touch Screens.CapStones are tangible blocks that allow the underlying capacitive touch screen to identify blocks and to sense how they are arranged in 3D.

Note at CHI'12.

More info at

CapStones and ZebraWidgets is a research project by
Liwei Chan,
Stefanie Mueller,
Anne Roudaut,
Patrick Baudisch,
Hasso Plattner Institute, Germany

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