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 9 of 86
A lock helps boats move. It moves boats up or down. This is for hills in the water. It works like a small room. The water goes in or out. Then the boat can move. Can you see how it works?
Early Reader · Change the reading level on the articleA locomotive is a big engine. It pulls a long train. It can use fire or power from a wire. This helps move things far away. It is very strong. Do you like trains?
Early Reader · Change the reading level on the articleThings move to where they are needed. Trucks and planes carry food and toys. People plan how to move them. This helps you get what you need. It is a big job! Do you like to help move things?
Early Reader · Change the reading level on the articleA smart computer tool was made. It can read many words. It learns how words fit. This tool helps us understand news. It can even tell stories. It was a big job to build. Do you like computers?
Early Reader · Change the reading level on the articleTrains run under the big city. They go through long tunnels. Some tracks are deep in the ground. Some tracks are on top. These trains help people move. It is a very big way to travel. Do you like trains?
Early Reader · Change the reading level on the articleLines go around the Earth. These lines help us find where we are. They run from the top to the bottom. They help us know our place on the world. It is like a map for the whole Earth. Can you find where you live?
Early Reader · Change the reading level on the articleA speaker makes sound. It uses electricity to move air. This makes the sounds you hear. You can hear music on it. It can be in a radio. It can be in a TV. Do you like music?
Early Reader · Change the reading level on the articleLouis Braille made a way to read. He used small dots on paper. You can feel the dots with your fingers. This helps people who cannot see. It is a great gift for the world. Do you want to feel the dots?
Early Reader · Change the reading level on the articleA man named Louis made early pictures. He used a camera to catch light. This helped us see the past. It is how we take photos today. Do you like to take pictures?
Early Reader · Change the reading level on the articleA Mac is a computer. It helps you do work. You can use a laptop. Some are big or small. They are very fun to use. Do you like computers?
Early Reader · Change the reading level on the articleA machete is a long tool. It has a wide blade. Adults use it for farm work. It can cut plants and food. It helps people in many places. Do you know any other tools?
Early Reader · Change the reading level on the articleA machine gun fires many times. It can fire as long as you hold the trigger. These tools are very heavy. They help soldiers in many ways. They can be on a truck or a plane. Can you see how big they are?
Early Reader · Change the reading level on the articleComputers can learn things on their own. They look at many facts to learn. This helps them do new tasks. It is like how you learn. It makes tools very smart. Can you teach a computer?
Early Reader · Change the reading level on the articleA press is a big machine. It uses a lot of push. It can bend metal. It can even make holes. This helps us make things. It is very strong. Can you imagine a machine that strong?
Early Reader · Change the reading level on the articleA magazine is a book of stories. It comes out often. It can be on paper. It can be on a screen too. You can read it for fun. Do you like to read stories?
Early Reader · Change the reading level on the articleThis is a long strip of tape. It can hold sounds. It can also hold movies. People use it to save things. We can listen to it later. It is very cool! Do you like to listen to music?
Early Reader · Change the reading level on the articleBad programs can hurt computers. They can steal your private things. Some programs hide inside other things. They can spread to many machines. This can make computers work slow. We use special tools to stay safe. Do…
Early Reader · Change the reading level on the articleBig ships move things on water. They carry food and toys. They also carry many people. This helps us get what we need. It is a very big job. Do you like boats?
Early Reader · Change the reading level on the articleMcDonald's is a place to eat. It has many restaurants. You can get fries and burgers there. It is in many parts of the world. Do you like to eat there?
Early Reader · Change the reading level on the articleWe use many ways to talk. We can use our voices. We can write notes. We can use phones to talk far away. These tools help us stay close. How do you talk to your friends?
Early Reader · Change the reading level on the articleMachines help us do work. Long ago, people used hands. Now, we use big tools. These tools can move fast. They help us make things. They make hard jobs easy. Do you like machines?
Early Reader · Change the reading level on the articleA memory card holds your things. It can save your photos. It can save your games too. This helps your tools work well. They are very small now. Do you use a memory card?
Early Reader · Change the reading level on the articleSome ships carry things for work. They move goods across the sea. They can also carry people. These ships help us get what we need. They are very big and useful. Do you like big ships?
Early Reader · Change the reading level on the articlePeople change metal into new things. They make tools and shiny rings. They can heat it or hit it. This helps make big ships and small parts. Metal is all around us! Can you find metal in your house?
Early Reader · Change the reading level on the articlePeople make new things. These things are special. They use tiny shapes. The shapes change how light moves. They can even hide things! This helps us build cool tools. Can you imagine a cloak that hides you?
Early Reader · Change the reading level on the articleA mic helps us hear. It turns sound into power. This power goes through a wire. It helps us talk on phones. It helps us hear music. We use them every day. Do you see a mic?
Early Reader · Change the reading level on the articleMicrosoft makes things for computers. They make games for the Xbox. They also make tools for school work. These tools help many people. Do you use a computer?
Early Reader · Change the reading level on the articleWindows is a tool for computers. It helps you use your screen. It shows many little boxes. These boxes are like windows. You can see many things at once. This helps you do work. Do you use a computer?
Early Reader · Change the reading level on the articleA microwave cooks your food. It uses waves to make heat. This makes food hot very fast. It helps us eat warm meals. It is a handy tool. Do you like warm snacks?
Early Reader · Change the reading level on the articleSome planes work for armies. They fly high in the sky. Some planes carry big things. Others help people find things. They help keep people safe. Do you like planes?
Early Reader · Change the reading level on the articleSome people build things for soldiers. They make roads and bridges. They also build strong walls. This helps the army move. It keeps them safe too. Do you like to build things?
Early Reader · Change the reading level on the articlePeople make tools for battles. These tools can be very dangerous. Some tools help people fight. They are made by smart workers. These tools change over time. Do you see tools at home?
Early Reader · Change the reading level on the articleA missile flies through the air. It uses a motor to move. It can go to a set spot. This helps it reach a target. It is a very fast tool. Do you know how it flies?
Early Reader · Change the reading level on the articleA moat is a big ditch. It goes around a castle. Some moats have water in them. Some are just dry. They help keep the castle safe. Do you like old castles?
Early Reader · Change the reading level on the articleA mobile device is a small computer. You can hold it in your hand. It uses a battery for power. It has a screen to see things. It helps you do many tasks. Do you have one at home?
Early Reader · Change the reading level on the articleA monorail is a special train. It rides on one single rail. It can go high in the air. This helps it move through big cities. You can see many views from the window. It is a fun way to ride. Do you want to ride one?
Early Reader · Change the reading level on the articleTwo brothers made a big balloon. They used hot air to fly. It lifted up into the sky. This helped people fly for the first time. It was a very big deal. Do you want to fly high?
Early Reader · Change the reading level on the articlePeople use special sounds to talk. These sounds are short and long. They make letters and numbers. This helps people talk far away. It is a fun way to send news. Can you hear the sounds?
Early Reader · Change the reading level on the articleA mortar is a tool for war. It is a metal tube. It shoots bombs high into the air. The bombs fall down in a big arc. It helps people in battles. Do you want to see more?
Early Reader · Change the reading level on the articleA motorcycle has wheels. It can have two or three wheels. You sit on a seat to ride it. It can go on roads or in dirt. Many people use them to travel. Do you like fast rides?
Early Reader · Change the reading level on the articleA computer needs help to work. This tool helps a computer run. It tells the computer what to do. It was very big in the 1980s. It helped many people use computers. Do you like using computers?
Early Reader · Change the reading level on the articleMultimedia uses many things at once. It uses words and sounds. It uses pictures and videos too. This helps us learn and play. It can be on a phone or a computer. Do you like to watch videos?
Early Reader · Change the reading level on the articleComputers use special codes to work. One code helps doctors keep track of you. It keeps your health facts safe. It helps many hospitals stay busy. It is a very smart tool. Do you like computers?
Early Reader · Change the reading level on the articleA musket is a long gun. It was used a long time ago. It helps people stay safe. People used it to hit targets. It is very old. Can you see how long it is?
Early Reader · Change the reading level on the articleA nail is a small tool. It is made of metal. It has a sharp end. It has a flat head. A nail holds things together. It helps us build. Can you find a nail?
Early Reader · Change the reading level on the articleTiny things can do big jobs. Scientists work with very small bits. These bits are smaller than a speck of dust. They can help make new things. This helps us every day. Can you imagine something that small?
Early Reader · Change the reading level on the articleThis is a very hot fuel. It sticks to things. It burns for a long time. It was used in many wars. It can hurt people. This is a serious thing. Do you see the sign?
Early Reader · Change the reading level on the articleThis is a famous magazine. It has many bright pictures. It shows us the world. You can see new places. It helps us learn. Do you like big pictures?
Early Reader · Change the reading level on the article