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 29 of 86
Many computers work together. They help send things fast. They send videos and pictures to you. This makes the web work well. It helps you see things quickly. Do you like fast videos?
Early Reader · Change the reading level on the articleThis tool helps people make books. It can use many colors. It can also use many kinds of writing. It makes pages look very nice. It is fun to use. Do you like books?
Early Reader · Change the reading level on the articleMany lands share one big power web. It moves power to your home. This web helps many people. It keeps the lights on for us. It is very large. Can you see the lights?
Early Reader · Change the reading level on the articleWe can separate liquids. Big towers do this work. They heat a mix to make it boil. Some parts rise up. Other parts stay down. This helps us get what we need. Do you want to see more?
Early Reader · Change the reading level on the articleA big tank mixes things. It can hold liquids or gases. New stuff flows in. The tank stirs it all up. This helps make new things. It works very well. Do you like to stir things?
Early Reader · Change the reading level on the articleComputers follow a list of steps. They go from one step to the next. Sometimes they jump to a new spot. They can even do a task over and over. This helps them work fast. Do you like to follow rules?
Early Reader · Change the reading level on the articleA fan oven uses a fan. The fan moves hot air. It moves the air around your food. This helps the food cook fast. It also cooks the food well. Do you like warm food?
Early Reader · Change the reading level on the articleA convention center is a big building. Many people meet there. They talk and share things. It has many large rooms. You can go there with a group. It is a fun place to learn. Have you ever been to a big meeting?
Early Reader · Change the reading level on the articleA convertible is a special car. It can have a roof. It can also have no roof. You can feel the wind. This makes driving fun. Do you like the sun?
Early Reader · Change the reading level on the articleA belt moves things along. It is a long loop. It goes around two wheels. A motor makes it turn. It can move boxes or food. It helps us work fast. Do you see one at a store?
Early Reader · Change the reading level on the articleMachines move things from one place to another. They can carry heavy stuff. This helps people stay safe. They work in shops and at airports. These tools help us every day. Have you seen one move a bag?
Early Reader · Change the reading level on the articleTrains run in a big city. They go under the ground. Some tracks are high up. The trains have no driver. They run all day and all night. This helps people get around. Do you like trains?
Early Reader · Change the reading level on the articleA computer has a main brain. Sometimes it needs a helper. This helper is called a coprocessor. It does hard jobs very fast. This helps the main brain work better. Can you imagine having a helper?
Early Reader · Change the reading level on the articleCopying means making a new one. You can copy a drawing. You can also copy a book. Long ago, people wrote books by hand. This helped keep stories safe. Do you like to copy drawings?
Early Reader · Change the reading level on the articleSome things are hard to copy. Movies and games use special tools. These tools stop people from making copies. This helps the people who made them. It can be hard to use sometimes. Do you like to watch movies?
Early Reader · Change the reading level on the articleCornelis was a smart man. He made many new things. He built a boat that goes under water. It could carry many people. He also made tools to see small things. He loved to invent. Do you like to build things?
Early Reader · Change the reading level on the articleA big machine picks corn. It works in a large field. It cuts the stalks fast. This helps us get food to eat. It is a very busy machine. Can you see it work?
Early Reader · Change the reading level on the articleThis is a big paper from Italy. It tells people the news. It is very old. People have read it for a long time. It helps us know what is happening. Do you like to read the news?
Early Reader · Change the reading level on the articleA corvette is a small warship. It sails on the big ocean. These ships help keep the water safe. They are smaller than other big ships. They can even carry a helicopter. Do you like big ships?
Early Reader · Change the reading level on the articleCosmo is a big magazine. It has many pages. It tells stories about clothes and life. It is for women to read. Many people buy it. Do you like magazines?
Early Reader · Change the reading level on the articleCostco is a big store. It is in many places. You pay to shop there. It sells lots of food. It helps many people shop. Do you like big stores?
Early Reader · Change the reading level on the articleA cotton picker helps get cotton. It can be a person. It can also be a big machine. These machines pick the soft white fluff. This helps farmers do their work. Do you like soft things?
Early Reader · Change the reading level on the articleA coupe is a type of car. It often has two doors. The roof slopes down at the back. Some have small seats in the back. This car looks very fast. Do you like fast cars?
Early Reader · Change the reading level on the articleA courier moves things for you. They carry boxes or letters. They can go very fast. This helps us get things quickly. It is a big job! Do you like getting packages?
Early Reader · Change the reading level on the articleA courtyard is an open space. Buildings go around it. It is open to the sky. People use it to play or work. It brings in light and air. Do you like playing outside?
Early Reader · Change the reading level on the articleCraigslist is a website for people. It helps you find jobs. You can find a home there, too. It helps us talk to neighbors. It is a very big site. Do you want to look at it?
Early Reader · Change the reading level on the articleA crate is a big, strong box. It can be made of wood. Some are made of metal. Crates help move heavy things. They keep our things safe. Do you see any crates?
Early Reader · Change the reading level on the articleCrayola makes bright colors. They make wax crayons. They also make markers and clay. These tools help you make art. They are safe for kids. Do you like to color?
Early Reader · Change the reading level on the articleA special tool cleans liquids. It moves liquid across a screen. This keeps the screen clear. It helps us clean water. It can even help make medicine. It is very helpful! Do you like clean water?
Early Reader · Change the reading level on the articleA crowbar is a strong metal tool. It helps us lift heavy things. It can pull nails out of wood. This tool makes hard work easy. It helps us fix things. Do you like to build things?
Early Reader · Change the reading level on the articleA big company makes trains. They build many kinds of trains. These trains carry people to work. They also carry heavy things. This helps people get around. Do you like to ride trains?
Early Reader · Change the reading level on the articleA crucible is a special pot. It can get very hot. It melts hard metal. This helps us make things. We use them in labs too. Do you like making things?
Early Reader · Change the reading level on the articleA cruise missile is a flying tool. It flies without a person inside. It can go a long way. It can hit a target very well. This helps people stay safe. Do you want to see it fly?
Early Reader · Change the reading level on the articleA cruiser is a big warship. It travels on the deep blue sea. These ships can do many jobs. They help protect other ships. They are very strong and fast. Do you like big ships?
Early Reader · Change the reading level on the articleA cruise ship is a big boat. It is for a fun trip. People stay on it like a hotel. You can see the blue sea. It is a fun way to travel. Do you want to go on a big boat?
Early Reader · Change the reading level on the articleA crusher is a big machine. It breaks big rocks into small bits. It can make sand or tiny dust. This helps us build roads. It is very strong. Do you like playing in the sand?
Early Reader · Change the reading level on the articleThis is money on a computer. It does not live in a bank. It lives in a big network. You can use it to pay for things. It is a new way to use money. Do you like using computers?
Early Reader · Change the reading level on the articleSmall rocks help our tools work. These rocks can change shape. They do this when they get power. This helps clocks tell time. It helps our phones work too. It is very helpful! Do you have a clock?
Early Reader · Change the reading level on the articleA crystal radio is a simple radio. It does not need a battery. It gets power from the air. You use earphones to hear the sound. It was a very popular toy. Do you want to listen?
Early Reader · Change the reading level on the articleC# is a way to talk to computers. People use it to make apps. It helps us build new things. It is very good at following rules. This makes the apps work well. Do you want to learn more?
Early Reader · Change the reading level on the articleWeb pages can look pretty. We use rules to pick colors. We can pick the font too. This helps the page look good. It makes reading fun for you. Do you like bright colors?
Early Reader · Change the reading level on the articleA curtain wall is a big wall. It sits between tall towers. These walls keep a castle safe. People can walk on top of them. They help keep bad people out. Do you like big stone walls?
Early Reader · Change the reading level on the articlePeople help you when you buy things. They can talk to you in person. They can also help you on a computer. This helps you use your new things well. It makes you want to come back. Have you ever asked for help?
Early Reader · Change the reading level on the articleYou can move words on a computer. You can pick a word to move. You can also make a new copy. This helps you work fast. It is like magic! Do you like to use a computer?
Early Reader · Change the reading level on the articleA cutlass is a short sword. It has a wide blade. Sailors used it on ships. It could cut through thick ropes. It was also a tool for work. Do you like stories about ships?
Early Reader · Change the reading level on the articleComputers talk to each other in a big way. This is like a world made of wires. We use it to play games. We use it to talk to friends. It helps us learn new things. Do you like to play games online?
Early Reader · Change the reading level on the articleSome people use computers to fight. They try to break computer systems. They may try to stop the lights from working. This can be very hard to stop. It matters to keep our tools safe. Do you use a computer?
Early Reader · Change the reading level on the articleA cyborg is part living thing. It has machine parts too. These parts help the body work. They can help people move or hear. This makes the body extra strong. It is very cool! Do you like robots?
Early Reader · Change the reading level on the article