Explore inventions, engineering, computing and the tools people build to solve problems. Choose an article below; its reading controls let you move between the available levels.
4,107 public articles · Page 3 of 86
Andrew Carnegie was a very rich man. He made steel for big trains. He also gave much money away. He helped build many libraries. This helped many people learn. He was a kind helper. Do you like to read books?
Early Reader · Change the reading level on the articleAndroid is a way for phones to work. It helps your phone run apps. Many people use it on tablets too. It makes your screen easy to touch. It is a very big system. Do you use a phone with it?
Early Reader · Change the reading level on the articleAn antenna helps us hear things. It catches signals from the air. It also sends signals out. This helps radios work well. We use them every day. Can you find one?
Early Reader · Change the reading level on the articleSpecial coatings help light pass through glass. They stop light from bouncing back. This helps you see better through glasses. It also helps cameras take clear pictures. It is like a magic shield for light. Can you…
Early Reader · Change the reading level on the articleApple is a big company. They make tools for you. They make phones and computers. They also make music players. These things help us work and play. Do you use an Apple tool?
Early Reader · Change the reading level on the articleAn aqueduct moves water. It carries water far away. It can be a ditch. It can be a pipe. It helps plants grow. It gives us water to drink. Do you like to play in water?
Early Reader · Change the reading level on the articleAn arch is a curved shape. It can hold up heavy things. It can also just look pretty. Arches help us build strong walls. They help us make big doors. Do you see any arches?
Early Reader · Change the reading level on the articleA big screw can move water. It turns inside a tube. This pushes water up to the top. It helps farmers water their plants. It can even make power. Do you want to see it spin?
Early Reader · Change the reading level on the articlePeople build big buildings. Smart workers make them safe. They help with lights and heat. They make sure buildings stay strong. This helps us stay safe inside. Do you like big buildings?
Early Reader · Change the reading level on the articlePeople can make their own islands. They build them in the water. Some islands have big cities. Some have big airports. These islands help us live and work. Can you imagine living on an island made by people?
Early Reader · Change the reading level on the articleComputers use special codes. These codes tell them what to do. A program helps turn the code into work. This helps computers run fast. It is a smart way to work. Do you like computers?
Early Reader · Change the reading level on the articleThings move in a long line. Workers add parts one by one. This helps make things fast. It can make cars or toys. It is a smart way to work. Do you like making things?
Early Reader · Change the reading level on the articleA big wall sits in a river. It is in a land called Egypt. The wall stops the water. This helps farmers grow food. It also makes power for homes. Can you see the big water?
Early Reader · Change the reading level on the articleBig tools look at stars. They sit in a dry place. Many dishes work as one. They help us see new worlds. This helps us learn about space. Do you like the stars?
Early Reader · Change the reading level on the articleSome planes fly low to the ground. They help people on the land. These planes are very strong. They can stay safe while they work. This helps keep people safe too. Do you like planes?
Early Reader · Change the reading level on the articleTwo brothers made moving pictures. They lived in France. They made a special machine. It showed films on a screen. This helped people see stories. It was very fun! Do you like movies?
Early Reader · Change the reading level on the articleWe use things to show who we are. It can be a card or a name. This helps keep things safe. It makes sure things are real. Do you know who you are?
Early Reader · Change the reading level on the articleMachines can do jobs by themselves. They help make things very fast. This helps us save time and food. It makes things work well. Machines do a lot of work for us. Do you see machines working?
Early Reader · Change the reading level on the articleMany people make cars. They design and build them. Some use big machines to help. This helps us get around. It is a very big job. Do you like cars?
Early Reader · Change the reading level on the articleAn axe is a tool for wood. It has a sharp head. It also has a long handle. People use it to cut trees. We can use it to make things. Do you like to build things?
Early Reader · Change the reading level on the articleAn axle is a long rod. It holds the wheels on. It helps the wheels turn. This helps cars and trucks move. It is very strong. Can you see wheels on a car?
Early Reader · Change the reading level on the articleA balloon floats in the sky. It is a big bag of air. Some bags use hot air to rise. Others use light gas. People sit in a basket below. It is fun to fly! Do you want to fly high?
Early Reader · Change the reading level on the articleA barcode uses lines to show info. It has thin and thick lines. A machine reads the lines very fast. This helps stores sell things. It makes shopping easy for us. Do you see them at the store?
Early Reader · Change the reading level on the articleA barometer measures the air. The air has weight. It pushes on us. This tool helps us see the weather. It can help us find a storm. Can you feel the air push on you?
Early Reader · Change the reading level on the articleA ram is a big tool. It is a heavy log. People use it to hit walls. It can break a wooden door. This helps people get inside. Do you see how big it is?
Early Reader · Change the reading level on the articleA battle axe is a tool for fighting. It has a sharp edge. Some are big and some are small. Long ago, people used them in wars. They were used by many people. Can you find an axe in a book?
Early Reader · Change the reading level on the articleA bayonet is a sharp tool. It fits on a long gun. It makes the gun look like a spear. Soldiers use it to stay safe. It can even help with work. Do you want to see more?
Early Reader · Change the reading level on the articleThe BBC tells stories. It is on the radio. It is on the TV. People use it to learn. It helps us all. Do you watch the TV?
Early Reader · Change the reading level on the articleParts in a machine move. Sometimes parts rub together. This can make it hard to move. A bearing helps parts move well. It lets them spin or slide. It makes things work fast. Do you like things that spin?
Early Reader · Change the reading level on the articleBinoculars help you see far away. They use two small tools side by side. You use both eyes to look. This helps you see how deep things are. They make small things look big. Do you want to see the birds?
Early Reader · Change the reading level on the articleSome fuel comes from plants. We can make it from crops. We can also make it from waste. It helps us move cars and planes. It is a kind of energy. Do you like plants?
Early Reader · Change the reading level on the articleA boat floats on water. It can be big or small. Some boats use wind to move. Some use a motor. You can use a paddle too. Boats help us travel. Do you like to ride in a boat?
Early Reader · Change the reading level on the articleBob Woodward is a news writer. He finds big stories. He works for a big paper. He writes many books. His work helps people know the truth. Do you like to read news?
Early Reader · Change the reading level on the articleA bow and arrow can shoot far. The bow is a curved stick. It has a strong string. You pull the string to shoot. The arrow flies fast. It is fun to watch. Do you want to try it?
Early Reader · Change the reading level on the articleA brand is a special name. It helps you know who made a thing. It can be a sign or a shape. Long ago, people used marks on cows. This helps us find good things. Do you see brands every day?
Early Reader · Change the reading level on the articleThe Brooklyn Bridge is very big. It goes over the water. It helps people get to New York City. You can walk or ride a bike on it. It is a famous place to see. Do you want to visit it?
Early Reader · Change the reading level on the articleA brush is a helpful tool. It has many small hairs. You can use it to clean. You can use it to fix hair. It helps us every day. Do you have a brush at home?
Early Reader · Change the reading level on the articleA vest can keep you safe. It covers your chest. It can be soft or hard. This helps stop things from hitting you. It is very useful. Do you want to see more?
Early Reader · Change the reading level on the articleThe Burj Khalifa is a very tall building. It is in a place called Dubai. It is the tallest building in the whole world. It can even reach the clouds! Many people visit it to see the view. Do you want to go up high?
Early Reader · Change the reading level on the articleA cabinet is a box for your things. It can have shelves. It can have drawers too. It helps you stay neat. You can find them in a kitchen. Do you have a cabinet at home?
Early Reader · Change the reading level on the articleWires bring TV to your home. These wires carry shows to you. They can also bring the internet. A small box helps your TV work. It makes the picture clear. Do you like watching TV?
Early Reader · Change the reading level on the articleSome cars move on long ropes. They can go up high mountains. These cars carry people and things. They help us get to hard places. It is a fun way to ride. Do you want to ride one?
Early Reader · Change the reading level on the articleA calculator helps with math. It has many buttons. You press buttons to add numbers. It shows the answer on a screen. It is small and easy to carry. This helps us do work fast. Do you like math?
Early Reader · Change the reading level on the articleA caliper is a tool. It helps us measure things. It can find how wide a hole is. It can find how long a stick is. This tool helps many people. Do you want to measure something?
Early Reader · Change the reading level on the articleA candle gives us light. It has a string in the middle. The string sits in wax. When you light it, it glows. It can smell good too. We use them on cakes. Do you like candles?
Early Reader · Change the reading level on the articleA cannon is a big gun. It shoots things far away. It uses a loud pop to work. This helps people in old battles. It is very strong. Do you like loud sounds?
Early Reader · Change the reading level on the articleA canoe is a small boat. It is long and thin. People use paddles to move it. It helps us travel on water. You can go camping in one. Do you want to try it?
Early Reader · Change the reading level on the articleCanvas is a strong cloth. It is used for many things. It makes tents and bags. It also helps artists paint. We use it for shoes too. Do you like to paint?
Early Reader · Change the reading level on the article