Those looking to tinker with humanoid robots aren't exactly lacking for options these days, but Cognitive Spring is taking a slightly different approach than most with its Arduino-based cSpring bipedal robot -- one of the semifinalists in the Insert Coin competition here at Expand.

ENGADGET: Insert Coin semifinalist: cSpring bipedal robot platform hands-on (video)

Rifkin based his work on dozens and dozens of recent breakthroughs in cognitive neuroscience, neuro-psychology and child development.

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