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The students at Wilder Elementary in Littleton, Colorado proved that Mom is right, “Wash your hands with soap and warm water!”? The third grade class did an experiment using Petri dishes prepared with agar (a seaweed derivative). Agar is an ideal “food”? source for the bacteria. The students collected samples around the school including on top of the tissue box, door knobs and more. You won’t believe what they found growing in the common areas that we all touch. They also tested how well common cleaners eliminated the bacteria.
The students also learned how to properly handle the growing bacteria. Always seal the Petri dishes and throw them away when you are done. The teachers had the students take pictures of the dishes, so they could refer back to their findings, without having to store bacteria that can make them sick.
Watch the Video to see what they found
Read more about how to do your own experiment with nutrient agar.
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February 4th, 2007 at 4:39 pm
I love your experiment on the kids
Im your biggest fan
February 4th, 2007 at 4:41 pm
I love you steve and the kids on the expriments you guys did and the teacher!!!!!!!
Im you guys biggest fan mostly Steve…
February 13th, 2007 at 12:40 pm
Awesome experiment. I love your website & your easy to follow experiments. We’ve used your insta-snow at a Girl Scout function and the girls LOVED it. They thought they were big time making snow on a 90 degree day. Keep up the great work.
February 13th, 2007 at 8:44 pm
Thanks for your kind words. We’ll keep working on new experiments.