I have done sooooo many!! But here are a few:
Two years ago, I tested to see which mouthwash killed the most bacteria in your mouth. (crest, listerine, salt water, and scope.) I swabbed a few of my classmates' mouths before and after swishing their mouths with each variable.
Another thing i did was test to see if you can tell the difference between boys and girls feet. I took pictures of my classmates' feet and then showed them the pictures to see if they could actually tell them apart.
Hope this helps!!
