The Dirtiest Things In Your House (You'll Be Surprised!) | Bacteria Experiment
Here is a link to the agar kit that I used so that you can do yourself! Last I checked it is only 18 dollars.
https://www.amazon.com/gp/product/B00W4XHF3G/ref=oh_aui_search_detailpage?ie=UTF8&psc=1...