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Bring out your pencils and a fresh sheet of parchment.

For Tinker Class is about to begin!

Welcome back to Tinker Class, our Crash Course in Science Fun 101 for the Science Seekers

and Inventoritos of tomorrow.

It's day four of week four, so if you're just joining us for the first time,

hit pause and go back and listen to the first three episodes of this week.

Don't worry, we'll be here when you finish.

This week, we're using inspiration from our wow in the world episode,

getting nosy about the science of smell.

On day one, we had you listen to this episode while jotting down any thoughts, ideas,

and questions that came to mind.

And on day two, we had you collect good smells from around your home.

Yesterday, you tested your favorite combination of these smells,

and gathered data based on your family's reaction to them.

And today, it's time to use that data to improve your jar of smells.

That's right!

Remember, the challenge this week is to create a collection of smells that your whole family can enjoy.

Using your data, see how you can change your smell combination to make it more pleasant.

And this might mean removing a smell or adding a smell,

or just adjusting how much or how little of a certain smell you include.

...