Why do you need to pee?

50% Off Amazing Science Kits - MEL Science, science delivered to your doorstep! Code=WHOSMARTED https://melscience.com/sBHm/ How do your kidneys work? What color should healthy pee be? Why do you need to stay hydrated? For free home activities sign-up at www.WhoSmarted.com See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info .