When you get thirsty, what do you do? You can turn on the sink and get a nice cup of clean water. Most of the time, we do not have to worry about the water that comes out of our sink. We know that it is safe for us to drink. However, what happens when there is an issue with our water? In some places where major flooding or other problems have occurred, people might have to boil their water before they can use it. This makes simple things like taking a shower, cooking, and brushing our teeth more difficult. But what about people who live in places where there is not much clean water? One of the major global problems that engineers are working on is making sure that everyone has access to clean water. In this activity, you are going to build your own water filter to see how you can make dirty water clean!