Thawing Colours Days 5 and 6: http://t.co/hkOJEW9p7 years 1 month ago
Big, beautiful piezoelectric crystal http://t.co/Jm28LGsT7 years 1 month ago
My dad's in the guardian! http://t.co/ZorFBKOY7 years 1 month ago
DIY Piezo: Rochelle Salt Crystals: http://t.co/0AFTVPqb7 years 1 month ago
Thawing Colours Days 3 and 4: http://t.co/OQf2Wd0q7 years 1 month ago

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