Science for Kids / Science's Not Boring: The Kids Science Podcast
A groundbreaking podcast for curious kids aged 4-12 that proves science is anything but dull.
Join our fictional AI hosts Mira, a brilliant 9-year-old, and her younger brother Finn, age 7, as they explore the incredible world of science. From exploding volcanoes and black holes to deadly venom and the tiny machines inside your own body, each episode uncovers the most astonishing, surprising, and sometimes mind-bending wonders of science - explained in a way that actually makes sense to kids.
Whether you're discovering how rockets blast into space, why dinosaurs ruled the Earth, what really happens inside a thunderstorm, how your brain pulls off impossible tricks, or why the ocean's deepest creatures glow in the dark - Science Is Not Boring transforms big scientific ideas into unforgettable stories that ignite curiosity and wonder.
Because science isn't a pile of facts to memorize. It's the story of how everything works - and how we figure it out.
A note on why we use AI. For us, AI allows us to deliver learning at a scale and quality that previously would have been too expensive. If we make the odd technical error, or the sound goes a bit funny, bear with us, we're trying our best. We hope you enjoy the show!
Science for Kids / Science's Not Boring: The Kids Science Podcast
What is a computer?
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Welcome to Science Is Not Boring by kidopoly.com. I'm Mira! And I'm Finn. Hey Finn! Did you know that the smartphone in your hand has 19 billion tiny little switches inside it?
SPEAKER_00Wait, 19 billion? Like actual switches you can flip up and down.
SPEAKER_01Not exactly like a light switch on your wall, because these are totally microscopic. Today we're talking about how computers actually think. You see, underneath all the awesome 3D games, funny videos, and cool apps, computers only ever do one single thing. They flip tiny switches on and off, super fast.
SPEAKER_00So my favourite video games are just switches flicking on and off. That sounds way too simple. Haha, it is simple.
SPEAKER_01But when you put billions of them together, they do absolute magic. Today, we're going to shrink down to the size of a single nanometer, travel back in time to a giant room filled with exploding glass tubes, and find out what an actual computer bug looks like.
SPEAKER_00Oh, I really hope it's not a creepy crawly bug. I hate bugs.
SPEAKER_01Just wait and see, let's dive in. Okay, so before we talk about giant rooms of glass, let's talk about how computers talk. You and I use words, right? We have a whole alphabet of 26 letters.
SPEAKER_00Yeah, like hello or pass the ketchup.
SPEAKER_01Exactly. But a computer doesn't understand our alphabet. It only speaks a mathematical language called binary. And binary has exactly two letters in its entire alphabet, a one and a zero.
SPEAKER_00Just one and zero? How do you say hello with just ones and zeros? That sounds like it would take forever.
SPEAKER_01It really is all about switches. Think of a light switch in your bedroom. A one means the switch is flipped on and electricity flows through the wire. A zero means the switch is flipped off and the electricity stops.
SPEAKER_00So on is one and off is zero. Got it. But how does that make a word?
SPEAKER_01If you want to type the capital letter H, the computer translates that into 01001000. It's just a pattern of eight little switches turning on and off in a very specific order.
SPEAKER_00Whoa! Wait, so every letter, every colour in a digital photo, every single sound in a video game, it's all just patterns of ones and zeros.
SPEAKER_01Yep, millions and billions of them working together. And the physical thing that actually does the flipping is called a transistor. But they weren't always microscopic. Back in the 1940s, before transistors were invented, a switch was big, hot, and made of glass.
SPEAKER_00Wait, big and made of glass?
SPEAKER_01Where exactly was this? And why glass? In 1945, at the University of Pennsylvania, scientists John Maukley and Jay Presper Eckert built one of the very first electronic general-purpose computers.
SPEAKER_00It was called the ENIAC. Was it the size of a laptop? Or maybe a big desktop computer? Not quite.
SPEAKER_01ENIAC was absolutely massive. It weighed 27 tonnes. That's as heavy as four full-size school buses. Four school buses? For one single computer? Yep, and it took up 1,800 square feet, which is bigger than a lot of normal houses. Instead of tiny transistors, it used something called vacuum tubes to act as the switches. Imagine a clear glass light bulb, about the size of your hand, glowing bright orange.
SPEAKER_00Okay, so the computer was basically a giant house-sized room full of light bulbs.
SPEAKER_01Exactly. It had 17,468 of these vacuum tubes acting as the ones and zeros. But there was a huge glaring problem. Because there were so many glowing tubes, they got incredibly hot and used massive amounts of electricity. Around 150 kilowatts. Did they melt? They constantly burned out. Every day or two, a tube would pop and break, and the whole computer would just stop calculating. A team of six brilliant women mathematicians had to physically walk inside the computer and rewire hundreds of heavy cables by hand just to run a new program.
SPEAKER_00That sounds exhausting and really, really hot.
SPEAKER_01It was practically a sauna in there, and because the switches were actual warm tubes or physical moving parts, they attracted some unwanted visitors. In 1947, a famous computer scientist named Grace Hopper was working on a different giant computer at Harvard University called the Mark II. What happened next? Did it break too? The computer stopped working because of a glitch. They searched the massive machine, checking all the mechanical switches. And guess what they found stuck inside one of them?
SPEAKER_00Please don't say a spider.
SPEAKER_01A moth! A real, actual moth had flown into the warm computer and gotten crushed inside a relay switch, stopping the electricity. They pulled it out and literally taped the dead moth right into their daily logbook. Haha, gross!
SPEAKER_00Wait, is that why we call it a computer bug?
SPEAKER_01Yes. Gracehopper's team wrote first actual case of bug being found. Ever since then, when there's a mistake in computer code or a glitch, we call it a bug. And fixing it is called debugging.
SPEAKER_00Okay, so we started with giant glass tubes that break all the time, catch moths, and heat up the whole room. How did we get from that to my tiny phone?
SPEAKER_01That magic happened in December 1947 at Bell Labs in New Jersey. Three brilliant scientists named John Bardeen, Walter Bratane, and William Shockley invented something completely new called the transistor. The tiny switch thing! How was it different from the glass tube? Instead of a fragile hot glass vacuum tube, they used special solid materials called semiconductors, like silicon, to control the electricity. It had no moving parts, no glass to break, and it generated almost no heat. That's a huge upgrade. How big was the very first one? The first working transistor was about the size of a paperclip, but they realised that since it was just a solid piece of material, they could figure out ways to make it smaller and smaller and smaller. In 1956, those three scientists were awarded the Nobel Prize in Physics because their invention changed the world. So engineers just kept shrinking them down? How small are they now? Mind-blowingly small. Let's do a comparison. Finn, pluck a single hair from your head.
SPEAKER_00Ow! Okay, I've got one. I'm looking at it.
SPEAKER_01That single human hair is about 80,000 to 100,000 nanometres wide. A nanometer is a measurement so tiny, it's one billionth of a single metre. That is super thin. I can barely even see the hair. Right. Now, the transistors inside the newest Apple A17 chip, the brain inside modern iPhones, are built on a 3 nm scale. Wait, 3 nanometers? Are you telling me? Yep, you could fit over 20,000 modern transistors side by side across the width of that single human hair.
SPEAKER_00No way! That's. I can't even picture that! How do they even build something that small?
SPEAKER_01They have to use extremely powerful ultraviolet lasers and special mirrors to etch the tiny designs onto silicon chips. It's some of the most advanced manufacturing on planet Earth. It's true! And because they are so incredibly microscopic, engineers can pack billions of them onto a single computer chip that's no bigger than your thumbnail. Your smartphone has 19 billion of these switches inside it, all flipping on and off billions of times a second.
SPEAKER_00That's why I can play 3D video games, take high-resolution photos, and stream videos on it. Because billions of tiny switches are working together like a giant team.
SPEAKER_01Exactly! Underneath the bright screen and the fun sounds, it's all just ones and zeros, happening faster than you can blink. And here's an amazing fact to show you just how fast technology has changed since 1947. Do you remember the Apollo 11 space mission that put the first humans on the moon in 1969?
SPEAKER_00Yeah, Neil Armstrong and Buzz Aldrin.
SPEAKER_01Well, the Apollo guidance computer that navigated their spaceship safely all the way to the Moon and back was an engineering marvel at the time. But it only had about 17,000 transistors inside it.
SPEAKER_00Wait, only 17,000 switches to fly all the way to the moon? But my phone has 19 billion.
SPEAKER_01Yep. The smartphone in your pocket has over a million times more memory and is over a hundred thousand times faster than the computer that sent human beings to the moon.
SPEAKER_00That is the craziest thing I've ever heard. My phone could probably fly a million spaceships at the exact same time.
SPEAKER_01Maybe. The invention of the transistor is often called the most important invention of the entire 20th century. Think about it. Without it, we wouldn't have laptops, digital cameras, modern cars, video game consoles, or even the advanced medical equipment that saves people's lives in hospitals. It literally changed the entire world. Alright Finn, it's time for the quiz.
SPEAKER_00Are you ready? I think so. I've been paying close attention to all these crazy numbers.
SPEAKER_01First question. What two numbers make up binary code? Next one. How much did the giant Eniak computer weigh in tons? Question three. What insect got stuck in the Mark II computer in 1947? Here's number four. What invention replaced the glass vacuum tubes? Last question. Roughly how many modern transistors could fit across the width of a human hair. Great job! Let's see how you did. The first answer is a 1 and a 0. For question 2, the ENIAC weighed a massive 27 tonnes. Number 3. The answer is a moth. Question 4. It was the transistor. And the final answer is about 20,000 transistors.
SPEAKER_00I got them all! I'm never going to look at my phone the same way again. 19 billion tiny switches! That is so cool! I know, right?
SPEAKER_01It makes you realise how much amazing science is hiding right inside our pockets. Hey listeners, if you thought this episode was mind-blowing, we'd love it if you could leave us a five-star review.
SPEAKER_00Yeah, give us five stars. If you would rather have a tiny transistor in your pocket instead of a giant glass vacuum tube, just scroll down on your podcast app and tap the stars.
SPEAKER_01And don't forget to head over to our site kidopoly.com for tons of fun learning games and cool activities to explore.
SPEAKER_00Plus, if you want your name on the show or just want to say hi, send us an email at hello at kidopoly.com.
SPEAKER_01Thanks for joining us today. See you next time on Science Is Not Boring. Bye everyone.