ALI ROGIN: Finally tonight, we leave you with a group of intrepid kids Indianapolis who set an ambitious goal this summer and hope to meet it.

Along the way, they're inspiring others to get off their screens and get outdoors.

ALI ROGIN (voice-over): This group of neighborhood friends heads out almost every summer day on a new adventure.

Seven boys and one girl, ages 10 to 15.

They call themselves the Creek crawlers.

MICHAEL: I'm Michael.

LOU: I'm Lou.

SAM FREDRICKSON: I'm Sam.

JACKSON KINNETT: I'm Jackson.

DEX DODSON: I'm Dex.

RUTHIE DINWIDDIE: I'm Ruthie.

HENRY: I'm Henry.

MICHAEL: And we're the creek crawlers.

This is day 25 of trying to get a 1 million followers by in the summer and today we're going to upgrade the fort and also swim and play games in the creek.

ALI ROGIN (voice-over): They document their adventures to post on Instagram and some of their reels have reached millions, even tens of millions of views.

MAN: Here we go.

That's a nice one.

DEX DODSON: We didn't really think it turned out like this.

We didn't really think that we hit our first gold 10,000.

SAM FREDRICKSON: When we first met our goal of 10,000 followers, I would have been flying with the thousands.

Like I would have been fine at least like if a couple people watched us.

But once we hit 10,000, it was crazy.

ALI ROGIN (voice-over): They started posting in late June and now they've exceeded 800,000 followers.

Their adventures can last an hour or all day.

MAN: I think we need a bigger stick in the middle.

ALI ROGIN (voice-over): They problem solve problems.

They get creative.

Here they used pieces of bark that had fallen off the trees to spell out creek crawlers at the entrance to their fort.

There's usually a cool find of the day that's included in each reel.

MAN: The cool find of the day are these ripped up champion pants.

ALI ROGIN (voice-over): And since it's Indiana, basketball plays an all important role.

The group cleared out space for a court under the trees in the shade.

Each creek crawler has a job.

For Jackson Kennett, it's all about the tunes.

JACKSON KINNETT: I'm the music person so like I, I usually do a lot.

Old scream, old school and it's like I, I like doing it a lot.

ALI ROGIN: Your musical tastes run, you know, retro.

Where does that come from?

JACKSON KINNETT: I really just like search up songs and if I like it, I really just like play it and like I know a lot of songs.

So I make like a playlist for some songs to play each day.

ALI ROGIN: And for Ruthie Dinwiddie, it's all about the details.

RUTHIE DINWIDDIE: I kind of help like an interior designer, kind of like I help like make everything look right and like it won't like look all messed up and stuff.

JESSICA DINWIDDIE: They leave and then they come back and then they leave again and -- MEREDITH FREDRICKSON: Oh yeah, I mean, I joke.

They really have a jam packed schedule from sun up to sun down most days.

ALI ROGIN (voice-over): Parents Meredith Fredrickson and Jessica Dinwiddie are as surprised as the kids at how the Creek Crawlers project has taken off.

MEREDITH FREDRICKSON: I've been kind of blown away that people are so interested, to be honest.

People have asked me, so, like, what are they doing?

And I'm like playing a Greek and just being good.

Nothing more than that -- JESSICA DINWIDDIE: Yeah, that's what we did, you know.

MEREDITH FREDRICKSON: Exactly.

It's pretty simple.

JESSICA DINWIDDIE: Yeah.

ALI ROGIN: Yeah.

And to that point, I wonder why you think this has resonated so much with so many people.

MEREDITH FREDRICKSON: I think because it is simple, to be honest.

I think in today's world we're craving that in a lot of ways the world and life is complicated.

And I think that people, when I stopped and thought about it, I thought, well, I guess it does make sense that we're all kind of just looking for something simple and joyful.

JESSICA DINWIDDIE: And it also, I mean, I think it's nostalgic too.

You know, I think a lot of the age range of the viewers are 45 and up.

Yeah.

And I think there, it's just bringing them back to a simple time in their lives, you know, where you didn't have all these big worries.

ALI ROGIN (voice-over): The comments on their posts back that idea up.

All of us out here remembering the best days of our lives while watching theirs.

Thanks for letting us relive our childhood.

I was a Ruthie.

Love how they are bringing back being kids.

No video games, outside playing, exploring.

I'm having a great summer just watching.

And their followers span the globe.

As for what they'll do with all the attention and any money they may earn from merchandise sales, Creek Crawler founders Michael Fredrickson and Lou Dinwiddie have a cause they want to help.

LOU DINWIDDIE: A percentage of all the money that we make we're going to donate to cancer research.

MICHAEL FREDRICKSON: We don't really need the money necessarily, but we want to at least put it to a good cause and we don't want to just take it in for us and ourselves only.

So we want to do something good with the money people get.

LOU DINWIDDIE: I think all, like every one of us have has had a family member that's died and fancier.

So that's all.

Spend my dose on all you want to do.

ALI ROGIN (voice-over): The Creek Crawlers plan to keep on crawling until they have to go back to school in a few weeks when they'll post less.