Or perhaps you saw Mashable's own CES coverage of the unveiling, when Lego made its first appearance at the world's biggest technology convention to officially announce Smart Play and Smart Bricks.
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Lego unveils sound, light-enabled smart brick
A yellow LEGO duck had another LEGO block with a black body and transparent material attached to it. After shaking the duck 2-3 times, a yellow light—matching the duck’s color—turned on in the ...
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