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Daisy, the world’s largest solar-powered tricycle Daisy, carried passengers around Seattle Center at the Mini Maker Faire. The Couch Armada’s mobile living room hangs out below.

The EMP Museum turned into a geeky playground this weekend.

More than 6,000 people of all ages came out to the fourth annual Seattle Mini Maker Faire, where exhibitors ranging from coders to scientists to crafters showed off an array of neat inventions. Maker Faire describes the event as “a place where people show what they are making, and share what they are learning.”

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My personal favorite may have been Daisy, the world’s largest solar-powered tricycle that carried passengers around Seattle Center. Daisy was built by Stanford neurobiology professor Bob Schneeveis and currently resides in Vancouver.

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I didn’t see it in action, but the Titanoboa “electromechanical serpent machine” looked awesome. The mechanical recreation of an extinct 50-foot one-ton snake was built in Canada and is “meant to provoke discussions of our changing climate and energy use in a historical context,” according to its creators.

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Another fun one was The Couch Armada, which showed off part of its mobile living room:

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Maker Faire launched its first event in San Mateo, Calif. a decade ago. About 15 cities around the world, including New York, Tokyo, and Rome, host larger “featured” Maker Faires each year while more than 120 locations host “Mini Maker Faires” like the event this weekend in Seattle.

Check out more photos of the Seattle Mini Maker Faire below:

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