4M - Green Science - Potato Clock

こんにちはマート | KON NICHIWA MART Verified independent store

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Use your experimental skills to find out which substances will power a digital clock. Includes 1 digital clock w/ wires, 2 pots, connecting wire, transparent tape, copper & zinc st rips & detailed instructions. Clock size: 2.5" x 1.25". Ages 8 years + Show more