Long ago, people didn't have electricity like we do today. π They used candles and lanterns to see in the dark, and they cooked food over fires. π³ Families spent more time together telling stories and playing games instead of watching TV or using phones. π²
People also went to bed when it got dark and woke up when the sun rose. π It was a simpler life, but they still had fun!
Phones without wires, like your mommy's or daddy's phone, use magic waves called radio waves π to send and receive sounds and pictures! These waves fly through the air like invisible birds ποΈ, carrying your voice to your friend's phone.
When you talk, your phone turns your voice into tiny invisible signals and sends them to a big tower nearby. The tower then sends them to your friend's phone, which turns them back into sounds! Isn't that cool? π
Long, long ago, people didn't have cars or bikes. They had to carry heavy things themselves! ποΈ Then, someone very smart thought of rolling things on round logs. Later, they made the first wheels out of wood! π³
We don't know exactly who invented the wheel because it was so long ago, but it helped people move things much easier!
Airplanes stay in the air because of their wings! βοΈ The wings are shaped in a special way so that when the airplane moves fast, the air pushes it up. It's like when you stick your hand out of a car window and feel the wind lift it up!
The engines help the airplane go very, very fast, and the pilot controls where it goes. So, the wings and the speed keep the airplane flying high in the sky! π€οΈ
Batteries are like little boxes full of energy! πβ¨ When you use a toy or a remote, the battery gives its energy to make things work. But just like when you eat all your candy π¬, the battery runs out of energy too!
When the battery is empty, it needs to be recharged (if it's rechargeable) or replaced with a new one.
Magnets are like magic! π§²β¨ They stick to some metals because they have a special power called magnetism. Not all metals stick to magnetsβonly ones like iron, nickel, and cobalt. Try sticking a magnet to your fridgeβit works because the fridge has metal inside!
Fun fact: The Earth is like a giant magnet too! Thatβs why compasses always point north.
The internet is like a big, magical library where you can find pictures, videos, and games! π It connects computers all around the world so we can talk to friends, watch cartoons, and learn new things.
Imagine it's like a giant spider web where every thread helps send messages and fun stuff to your tablet or phone! πΈοΈπ±
Our body is like a superhero! π¦ΈββοΈ It has tiny soldiers called white blood cells that fight germs to keep us healthy. When germs try to make us sick, these soldiers rush to the rescue!
Sometimes, we get a fever π€ or a runny nose π€§βthatβs our body working hard to kick the germs out!
Cars move because they have engines inside them! ππ¨ The engine makes the wheels turn, and when the wheels turn, the car moves forward or backward.
When mommy or daddy presses the gas pedal, the car goes faster! οΏ½ And when they press the brake pedal, the car stops. π
Electricity is like magic power that makes things work! β‘ It lights up our homes, powers toys, and makes TVs show cartoons. Tiny things called electrons move really fast through wires to create electricity.
Imagine it like a river of tiny, invisible helpers who bring energy to your toys and lights! π