Produced by the I-Lab at W-B-R, Boston.

Welcome to Kind World. I'm Yasmin Hammer.

And I'm Andrea Aswahi.

So our Kind World season officially wrapped last week,

but this week we've got something a little different for you.

Instead of sharing just one story of kindness,

we've created a playlist we're calling the gift of kindness.

All the stories you'll hear today are about gifts that made all the difference.

We'll start with our 2016 story about a group of women who banded together to bring a little bit of light

to a family who experienced a terrible tragedy. Here's producer Erica Lance with secret sisters.

As a young boy in Mechanicsville, Virginia,

Nate Matheny had a habit of disappearing.

Nate had a tendency to wander.

He'd sneak out the back door if you didn't keep an eye on him and he would go on to people's front porches and

If they had wind chimes he would just stand under their wind chimes and listen to the wind chimes chime.

That's Nate's dad, Kevin Matheny.

Nate was always drawn to sound.

Partly because he had Williams syndrome,

it's a genetic condition that involves developmental delays and heart problems, and people with

William's syndrome often have hypersensitive hearing.

At six years old, Nate couldn't talk, but he sang or hummed almost all the time.

One day, Nate seemed irritable.

...