We can not see microscopic creatures such as bacteria, and these creatures can make us sick as well as benefit us. Well, are there bacteria in places such as doorknobs, keyboards, faucets, which we constantly have to touch in our daily life? With our 5th grade students, we took bacteria samples from the places we touch a lot in daily life and planted them on the media. A week later, while examining the developing bacterial colonies, our students were very surprised to see how many microscopic living things were around us.