Howcast - mrfixitrick's playlists 214 ScienceExperiments 263 Wed, 16 Apr 2008 16:22:01 -0700 2 1 http://www.howcast.com/playlists/214-ScienceExperiments http://www.howcast.com/system/thumbnails/2948/FIXED_coin_battery_sd_medium.jpg