My family did a clean water experiment. We went outside and got some dirt from our garden. Then we added water to the dirt and got our materials. We wanted to see which material will clean out the most dirt. We used a sock a paper towel and a coffee filter. In the end the paper towel had the clearest water and the less dirt. Second was the sock and third was the coffee filter which had dirt and mud in the bottom of the bowl. It was fun.