4 results found for 11-14-year-olds

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00:05:00

The Light Bulb

by Bill Hammack | Lectures | 11-14 and upwards | 13 years ago | 5940 views More details Watch now
00:03:00

The Geiger Counter

by Bill Hammack | Lectures | 11-14 and upwards | 13 years ago | 1545 views More details Watch now
00:03:00

IBM Selectric Typewriter

by Bill Hammack | Lectures | 11-14 and upwards | 13 years ago | 6308 views More details Watch now
00:03:00

Coffee Maker: Pumping water with no moving parts

by Bill Hammack | Lectures | 11-14 and upwards | 13 years ago | 1807 views More details Watch now