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Ruby, Lena and Charlotte are three young girls who built a secret knock gumball machine by following Steve Hoefer’s instructions in MAKE. As demonstrated at Maker Faire Bay Area 2011, a special knock (shave and a haircut, but don’t tell…) activates the gumball dispenser. For their next project they are thinking of designing a car that looks like a camel.

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Becky Stern

Becky Stern

Becky Stern is director of wearable electronics at Adafruit Industries. Her personal site: sternlab.org


One Response to Girls Build Secret Knock Gumball Machine

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  1. maifymorton on said:

    look at for less , just clicks away

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