Tonight we follow the pool’s “tiny river” to see how calm water stays clean—and why bodies float. We picture the hidden loop (skimmer → pump → filter → return jets), learn how chlorine and balanced pH keep water friendly, and then slip into the physics of floating—buoyancy, density, and displacement (with lungs as soft balloons).

Grown-ups: we value your feedback. Our email and message link are in the episode notes—please send us your child’s questions and thoughts.

Sleep Tight!, 

Sheryl & Clark

❤️👂📖

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About Sleep Tight Science

We’ve got bedtime down to a (Sleep Tight) Science! Sleep Tight Science is an award winning bedtime podcast that makes science accessible and enjoyable for the whole family. Snuggle in and drift off to sleep while learning about science topics submitted by listeners! Designed for curious young minds (but simple enough for grown-ups to understand), Sleep Tight Science uses big words to answer big questions that kids wonder about, like why do we feel icky sometimes and how do our legs help us move? Learn something new about the natural world while drifting off to dreamland. Have an interesting science question or a topic you’re curious about? Email us at ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠[email protected]⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠, and it might just be the focus of an upcoming episode!

Dedicated to enhancing the health and happiness of children, Sleep Tight Media helps families replace bedtime struggles with bedtime snuggles. 

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