Child's Play

Black Sand Treasure Hunt

September 8th, 2012

Saturday, Sept 8, 10:30 a.m.–noon
Ocean Beach
Search for elusive “black sand” (aka the magnetic mineral magnetite). Tools and materials will be provided, and take home black sand and magnets, to make your own miniature Black Sand exhibit — just like the one at the Exploratorium. $15 (members only), 415-561-0360,

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