Nick and Tesla’s High-Voltage Danger Lab: A Mystery with Electromagnets, Burglar Alarms, and Other Gadgets You Can Build Yourself – Pflugfelder, Science Bob (CDs)
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Nick and Tesla’s High-Voltage Danger Lab: A Mystery with Electromagnets, Burglar Alarms, and Other Gadgets You Can Build Yourself – Pflugfelder, Science Bob (CDs)