The kidneys are special organs that help clean our blood.
Example 1: Imagine you have a sponge that soaks up dirty water. The kidneys act like that sponge, soaking up all the bad stuff from our blood.
Example 2: When you drink water after running, your kidneys help get rid of the extra water by making urine so you don't have too much in your body.
Example 3: If you eat too much salt, your kidneys help take some away so your body feels good and stays healthy.
Fun Fact: Your kidneys are very important and can clean your blood even while you are sleeping!