Demonstrate how the shape of your ear helps you localize sounds coming from above and below

Try this with a friend!

1. You and your friend should stand/sit directly across from each other.
2. Get your friend to close their eyes.
3. Clap or snap your fingers in different places and get your friend to
   point out where the sound is coming from. They should be pretty accurate.
4. Now ask your friend to squish/distort their ears.
5. Repeat step 3 - it should be a lot harder to tell between up and down.
6. Switch roles and see for yourself!