Why do you need to pee?

<p>50% Off Amazing Science Kits - MEL Science, science delivered to your doorstep! Code=WHOSMARTED www.MELScience.com</p><p>How do your kidneys work?&nbsp;What color should healthy pee be?&nbsp;Why do you need to stay hydrated?</p><p>For free home activities sign-up at <a href="http://www.WhoSmarted.com" rel="noopener noreferrer" target="_blank">www.WhoSmarted.com</a></p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.</p>