The communicating vessels principle states that water can flow between connected containers at different heights, and by using a siphon (a tube that creates a continuous water flow from a higher to a lower point), water can be transported from a stream to a distant pool without manual pumping. This scientific principle allows water to 'walk' through hollow pipes, demonstrating how understanding physics enables practical solutions to everyday problems.
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Deep Dive
Roro, Dodo & Kiki: How Dodo the Rabbit Made Water Walk!
Added:It's too hot.
>> We'll find water.
>> Let's keep moving.
>> Oh, look. We found some water and shade.
>> Purr.
>> Is it cold?
>> Keep swimming, Lily. We'll be all right.
>> Dodo, Roly, Kiki, thank goodness you're here.
>> Don't worry, Lily. We brought help.
We'll find a way to cool things down.
>> All right, team. We're here.
>> Oh, finally some shade.
>> It is a very hot morning, team.
>> Quack.
>> Meow.
>> Meow.
>> We need to keep moving.
>> Keep waddling. We're almost there.
>> I'm so tired.
>> We're here to help.
>> Please help me.
>> Quack quack.
Quack quack.
>> It is too hot.
>> I am a baked yellow duckling.
>> I want to swim in the cool whispering stream. It sparkles so brightly. Let's go.
>> Oh, I'm so hot.
>> Don't worry, Soso. We'll help.
>> Time for a little adventure.
>> Meow.
>> We are walking too fast, Roly.
>> Quack quack.
>> We must walk slowly to save our energy.
>> The heat makes cats very sleepy.
>> Keep going, friends.
>> Waddling and waddling.
>> Almost there.
Do you hear that?
What is that sound? It sounds like >> Mhm.
>> water.
>> You look so hot, Soso.
>> I am. It feels like this heat will never end.
>> Don't worry. Lily and the others are coming.
>> Oh, I'm so exhausted.
>> I am so tired.
>> Oh, it is too hot.
I miss the cold water.
>> We'll help you, Soso. Don't worry. We're here.
>> Hello, new friends. Together, we can find a way.
I am Dodo.
>> These are my best friends, Roro and Kiki.
>> Why do you look so sad, Soso?
>> We need to find the others quickly, Lily.
>> Yes, but what is the plan?
>> Hello, Dodo.
I am Lily.
And this is Soso. Soso is a seal.
>> Sigh. Sigh.
>> He needs water to stay cool.
>> Ooh. It's really warm in here.
>> I'm trying my best.
>> I am fanning him with my fluffy tail.
>> Sighs dramatically.
Thank you, Lily, but he is still too hot.
>> Don't worry, Lily. We'll figure it out.
>> Quack, quack, quack.
Quack, quack, quack, quack.
Quack.
>> That is easy.
Soso can jump into the whispering stream.
>> [laughter] >> The water is very nice and cool.
I cannot get up. I am too tired.
I cannot stay in the stream all day, Roro.
>> [cough] >> My house is near the big tree.
>> Oh, good.
>> Yeah.
Let's go.
>> Are far from the stream.
I want to build a mini pool right next to my house.
>> [laughter] >> Then I can sleep in the cool water every day.
>> Meow.
That is a very good idea.
>> Look, the dry hole is right here.
>> Oh, dear. So it is.
>> Oh my, it's all dried up. Must fan harder.
Ah.
Ah.
We already dug a big hole.
But we have a big problem.
It's so beautiful, but too far.
>> Sigh.
>> Sigh.
We can get there.
How do we put the water from the stream into the hole? We need something to carry it with. Let's look around.
Quacks eagerly.
We only have two tiny cups.
>> It will take 100 years to fill the pool.
The water is indeed too heavy to carry in these tiny cups.
Sigh.
I will be a hot seal forever.
I can't take this heat.
Don't worry, I'll cool you down.
I have an idea.
We can do this.
Do not worry, So So. Quack.
Meow.
We will solve this together.
Do not be sad, Lily.
We will not use tiny cups.
We will use science.
I'm not sure what you mean, Dodo. It sounds important, though.
So, here's the plan. We follow the starlight, avoid the shadows, and collect the luminous moss to power the bridge. Meow.
We will use a magic rule dot called communicating vessels.
It will make the water walk from the stream right into your pool.
>> Quack.
Quack, water can walk?
>> Meow.
Water does not have legs, Dodo.
>> Yes, you are correct, Kiki.
>> [laughter] >> You are right. Mhm. It will be all right.
It is science, team.
>> Quack.
>> Meow.
>> Get ready for a great summer adventure.
All right, team. Let's focus. The path ahead is tricky, so stick together and follow my lead. Ready?
I can do this.
I have a plan to make the water reach the garden. Quack, I can help. Meow, let's do it. We need to work together.
>> First, we need something long and hollow.
>> Look, there's a problem.
Oh, no, it's so hot. We need a big leaf.
We need those green bamboo pipes.
The bamboo is too tall. Don't worry, we'll figure this out.
We have to help Soso.
>> Quack, they are too tall for me.
>> Soft, gentle meows.
>> We have to climb that?
>> Yes, but together.
Be careful. I'm worried about you.
>> Meow.
I will climb the trees to get the bamboo.
>> Quack.
Kiki is very fast.
>> Meow.
I found the perfect pieces, Dodo.
Excellent aim, Kiki.
Okay, I'm here. What's next?
OH, THERE IT GOES. BE CAREFUL. We have to get this to the stream.
>> [whistles] >> I have it.
>> Meow.
Sigh.
Purr. I think that's it. We have enough now. We're exhausted, Dodo. Let's build it quickly. We are counting on you, Dodo.
That is enough, Kiki. Thank you.
Meow.
Meow. It was very easy.
You see? They're completely sealed at the bottom.
We need to do something about this, but carefully.
Now we have pipes.
But they are blocked inside.
>> Water cannot walk through a blocked pipe.
>> I made it.
>> Glad to see you, Lily.
We're all here now.
I will fix it.
I will use my strength to break the inside walls.
Almost there. Push.
Push. Just a little more.
It worked. We did it.
Huh.
One pipe is clear.
I'm here, ready to help.
This pipe is heavy.
We can move it together.
Keep holding it steady, So So.
I'm trying. My flippers are tired.
Almost there.
>> [groaning] >> I believe in you, Lilly. Crack.
Oh, wonderful.
Quack, quack.
Go, Lilly.
Go, So So.
All the pipes are hollow now, Dodo.
Perfect teamwork.
>> Hmm, looks sturdy.
Yep, it's perfect, Dodo.
Now, let's go, friends.
>> Now, we connect them all.
>> All right, just slide it here.
Got it. Looks secure.
>> Perfect.
>> Ready for the next one?
>> Almost there.
>> Just a little more.
>> [groaning] >> Got it.
>> Phew, success.
>> The pipe is ready.
>> Let's do it.
>> I hope this works.
>> So hot.
>> All right, team, let's get this done.
>> Waddling ready.
>> I'll support it here.
>> Slow and steady.
>> Excited, Quack.
>> Steady now.
>> [screaming] >> The water side is ready, team.
>> Hmm. It's so dry.
>> Hmm.
>> Hmm. But, I guess it could work.
We'll see.
>> But, the water is not walking, Dodo.
>> We have to start the magic siphon.
>> Roro, we need your strong duck lungs.
What is that?
Something's down there. Let's go see.
Quack.
My lungs?
I have very strong duck lungs.
Suck the air out of the pipe, Roro.
Quack.
Okay.
Okay, I can do this.
>> [snorts] >> Quack.
Quack.
It is hard. You are doing so well, little one.
I'm so tired.
Just a little further. We're here for you.
Meow. Try again, Roro. You can do it.
Quack. I'll try.
Go, Roro.
Go, Roro.
All right, here goes nothing.
Comical inhalation. Continuous dramatic exhalation. Quack.
>> [sighs] [panting] >> Here it comes.
Oh, wow. It's really cold in there.
It feels like magic. Meow.
The water is coming. Move your beak.
>> [laughter] [groaning] >> The water is walking.
>> [laughter] >> It worked. Dodo science worked.
I'm back, friends. I found it.
>> [laughter] >> Oh, good. You're safe.
>> I think that's just perfect.
Mhm, row.
The magic siphon is working perfectly, team.
>> [laughter] >> Look, So-So. We made it just for you.
>> It's so cool.
>> You can finally cool off now. We were worried about you.
>> Oh, I'm so tired.
Look at that water.
Oh, wow.
Almost there. Ooh, yeah, almost there.
Phew, yes. HMM, WOOHOO.
>> [laughter] >> SPLASH.
AH, THAT'S BETTER.
AH, that feels better.
The water is wonderful today. So relaxing.
>> This is amazing. I am not hot anymore.
>> We're so proud of you. You did great.
Nice job.
>> I am a very cool and happy seal.
>> Hmm, seems safe enough.
Just a little dip.
It is very nice and cold.
Oh, oopsie. Giggling.
>> [laughter] >> Here, let me wipe this off.
Soft sigh. There.
It feels so good.
I think I know how to get the water to walk.
Be careful, Roro. Quack. Make room for the duck.
Quack.
>> [screaming] >> Yeah.
I'm flying.
Quack.
>> [laughter] >> This is the best summer day ever.
THANK YOU, SCIENCE.
YOU'RE WELCOME. Time to rest.
Quack, quack. Meow.
This spot is perfect. Sigh.
This looks like the perfect spot.
The water is perfect.
So cool.
Thanks, Dodo, Kiki.
I think this is working perfectly.
>> [laughter] >> We did a great job, team.
>> Wow!
>> Meow. The air around the pool is very cool now.
It is a very good invention.
Ah, yeah.
Soso and I want to share our snacks with you.
Quack.
SNACKS.
LET'S SHARE THIS.
THANK YOU. I'm so tired. Hooray for snacks.
We're glad to help, Soso. Here, have a berry.
>> Oh, thank you.
Oh, this berry is delicious.
I feel so much better.
Why did the seal cross the forest?
>> Quack. Because Dodo built him a pool.
QUACK, QUACK, QUACK.
>> [laughter] >> MEOW. HEHE.
>> [laughter] >> THAT WAS A good one. Ha, I needed that.
>> Thank you very much, my new friends.
>> [screaming] >> I was very sad and very hot this morning.
>> [laughter] >> I thought a mini pool was impossible.
>> Yes, the water was too heavy and the stream was too far.
>> [laughter] >> But you used the magic walking water.
You are doing great, but maybe try this way.
Okay, I will.
It is not magic, Lily. It is science.
Science is wonderful.
But today we learned an even better lesson.
Meow. Meow. What is the lesson, Dodo?
The best magic is teamwork. Yeah.
We can do this. Kiki climbed. Lily used her strength. Roro used his lungs. And Soso, you kept us going.
And Soso gave us a great idea.
When good friends work together, we can solve any big problem.
Quack. And we get to eat sweet berries, too. We did it. Yes. Hooray! To the magic walking water.
The best team ever.
>> [laughter]
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