If you have access to 'dirty water' (like a puddle of muddy water from a dirty area... or seawater) and a laser pointer, you can make a DIY microscope at home a

If you have access to 'dirty water' (like a puddle of muddy water from a dirty area... or seawater) and a laser pointer, you can make a DIY microscope at home and see the stuff inside yourself. https://www.youtube.com/watch?v=bYEuo3j2Ly0 https://www.youtube.com/watch?v=bYEuo3j2Ly0 (not a "real" microscope, but more like something for the kids to try out and see actually living, moving microorganisms projected on the wall)