"Squid Game" is all about playing childhood games, so I thought we could have some fun with that."

You're about to face off against each other in the "Tonight Show Schoolyard Games."

Here we go.

-♪ Schoolyard Games, ooh, yeah ♪

-Now, the games will now begin.

All will play, but only one can win.

Round one, Slapsies.

[ Dramatic music plays ]

[ Applause ]

This is the game where you do this over each other's hands.

You can kind of fake out, but if you fake out and you flinch and move all the way back, you slap the hand.

But if you can do it fast enough and just go like --

wa-psh!

That's Slapsies, yeah.

Yeah. It might not be called that.

We might have made up the name "Slapsies."

But that's the game.

Jung-jae, Hae-soo, you're up first.

On your mark.

Get set.

-[ Speaking native language ] -Go.

♪♪

-Whoa!

-Wow. -Yeah.

[ Laughter ]

[ Bell dings ]

[ Cheers and applause ]

-Hae-soo, you won that one.

[ Laughs ]

Not at the whole game. Not at the whole game.

Okay.

Ha-Joon, Hoyeon, you're up next.

♪♪

-[ Speaking native language ] -Okay.

-[ Speaking native language ] I want to...

-Three, two, one.

♪♪

Yeah! Oh, my God! Yeah!

First try!

-[ Speaking native language ]

-All right. That means we go to the final round right here.

Hae-soo, Hoyeon, you are up against each other.

Yeah. Good -- Best of luck. Yeah.

This is what I'm talking about.

-All right. One, two, three.

♪♪

[ Bell dings ]

-[ Laughs ]

Are you okay? -Congratulations.

It is time for the next round.

And things aren't going to get any easier.

Because you're about to play one of the most dangerous games of all -- Rock, Paper, Scissors.

[ Dramatic music plays ]

Jung-jae, Hae-soo, you are up first.

Rock, Paper, Scissors.

Whenever you're ready, you can go.

-[ Speaking native language ]

-[ Bell dings ] -Jung-jae!

Jung-jae is the winner of that one.

Ha-Joon, Hoyeon, you're up now.

-Both: Rock, paper, scissor!

-Okay. -There's two scissors.

-Rock, paper, scissor!

-No!

-[ Bell dings ] -Here we go!

Now, Jung-jae, Ha-Joon, you guys have to go head-to-head rock, paper, scissors to see who the winner of this match is.

Here we go. I know. Look at this.

Whew. Gear up.

Mentally focus. When you're ready. Yeah.

-[ Speaking native language ]

-[ Bell dings ] -Oh, yes!

That's what I'm talking about right there!

Ha-Joon! Congratulations, bud!

[ Cheers and applause ]

All right. We've now reached the final round.

This determines the winner of everything.

But before we play, each of you must pick a number between 1 and 4.

[ Laughter ]

♪♪

-I will go...number two.

-Three.

-Okay. -Four.

-One. -One.

-Yeah, you have no choice. You have no choice.

You're one. Okay, here we go.

Now that your numbers are locked in, the game may begin.

It is time for Egg and Spoon Race.

[ Dramatic music plays ]

But not all spoons are created equal.

The number you choose determines your spoon.

Please take the spoon that matches your number.

-Ah.

-What is number two?

-Three. -Number two!

Yeah! Number two! -Yeah, that's a good one.

-[ Laughs ] Four. One.

-Oh, no. Oh, no.

One, you got -- You have a tough --

[ Laughs ] Oh, my gosh.

Oh, no. Oh, no. Okay. Oh, no. All right.

When you're ready, take your places and get ready to race.

The first person to cross the finish line with an intact egg is the winner.

On your mark. Get set.

-On my mark.

-Go!

-Aah!

-Ohh! Hey! All right.

Jung-jae. Jung-jae, you get it. But you know what?

You're all winners.

I want to thank the cast of "Squid Game."

The number-one show on Netflix. Streaming right now.