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It's safe to say that fidget spinners and fidget cubes were some of the biggest trends of the past year. They're especially popular with school-age kids who have issues with stress or a lack of focus, ...

SAN FRANCISCO — Last week, on the third floor of a small building in San Francisco’s Mission District, a woman scrambled the tiles of a Rubik’s Cube and placed it in the palm of a robotic hand. The ...