circuitforkids.electronicsdep.com — Snap Circuits Extreme SC-750 Build over 750 experiments with 80 partsExperiments included: sound activated switch, lie detector, adjustable light controller, Oct 25, 2011 View in Crawl 4
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It's quiet in here... can you hear the echo?
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No comments yet
It's quiet in here... can you hear the echo?