Hello and welcome back to the Curious Kid podcast.

If you are a longtime listener of the podcast, you may remember that we released an episode on cleanliness 301 episodes ago.

That episode came out in November of 2019.

We discussed things like soap, shampoo, and hand sanitizer in that episode. Little did we know at the time that many people would become obsessed

with cleanliness just a few months later when the COVID pandemic began. This week, we are going to

dive a whole lot deeper into the world of shampoo

to learn more about that stuff we put in our hair and how it works.

Double mail bag!

Double mail bag!

Hi there, my name is Seoul. I am seven years old and I live in England. My city is Nottingham,

which is where Robin Hood comes from. I really want to get curious about the sunset and sunrise,

how glass is made, how shampoo is made, is it true that the moon is made of cheese? How does pee water get changed

into clean water that we can drink? Who was the first human to make language, and where does it

come from? Why does water sometimes come out of the ground or cliffs? And how does Alexa work?

My big brother, Ben, would like to get curious about glaciers. I love listening to

your podcast every single night in bed. Love Soul and Ben. I love your podcast. I've listened to

every episode. My favorites were curious about teeth, sleep, octopuses, and the brain. I hope you can get curious about deodorant,

shampoo, and toilet paper, Lane from Tucson, Arizona. Wow, Dad, these might be some of the biggest

fans of the podcast we've ever heard from. One of them listens to us every night at bedtime, and the other one has

listened to every single episode of the podcast. I don't think I've listened to every episode of

the podcast, and it's my podcast. I'm so excited to learn all of that shampoo this week for Soul,

Ben, and Lane. Let's start learning about that magical

...