Here is the list of items for the "Window Walks" (Creator unknown):
You could even try this experiment at home.
Tip 1: It works best with fresh bread (homemade or bakery made). Tip 2: Dry your hands well after washing!
We asked the students to wash their hands, and then had them touch a piece of bread. This is what it looks like now, 10 days later:
We then talked about how to wash hands properly, and we made up a song to the tune of Frère Jacques, which went something like this:
Wash your hand, wash your hand
Front and back, front and back
Between your fingers, between your fingers
Wrist and nails, wrist and nails
We then sent them to wash again, using this song and lots of soap.
This was the result!
The last picture is a slice of untouched bread.