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[quote=Anonymous]My kid's 7th (or maybe 8th) grade project was bacteria collection. We ordered prepared agar Petri dishes and he swabbed various places to compare bacterial growth. He used places/things we normally think of as clean... home toilet, home desk, home railing, fridge door, etc. and compared with public versions... public restroom, public desk, public railing, door handles, etc. His friend did cell phones, which was fun to see. He had people self-categorize as a heavy user (talking on the phone & browsing the web), talker mainly (didn't do much else except use it for calls), and texter mainly (rarely used it for calls) and swabbed their phones to compare bacterial growth. [/quote]
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