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 12 of 86
A sailing ship moves on water. It uses big sails to move. The wind pushes the sails. This makes the ship go. It helps people travel far. It is a fun way to see the sea. Do you like the wind?
Early Reader · Change the reading level on the articleA sale is when you buy things. You give money for a toy or food. A shop worker helps you. You and the worker agree on a price. This makes the item yours. Do you like to shop?
Early Reader · Change the reading level on the articleSamsung is a very big company. It makes many things. They make phones and TVs. They also make big ships. The name means three stars. These stars are big and strong. Do you use things they make?
Early Reader · Change the reading level on the articleSamuel Morse was a smart man. He liked to paint pictures. He also made a new way to send messages. This helped people talk from far away. It was a big help to us. Do you like to send messages?
Early Reader · Change the reading level on the articleSam Walton was a man who sold things. He started a big store called Walmart. He worked hard to help his family. Many people shop at his stores today. He was a very busy man. Do you like to shop at stores?
Early Reader · Change the reading level on the articlePipes hide under the ground. They carry waste away from homes. This helps keep our towns clean. It keeps us safe too. Do you know where the waste goes?
Early Reader · Change the reading level on the articleSpace tools help us find our way. They fly high in the sky. These tools tell us where we are. They help us on land and sea. They are very helpful to us. Do you like to explore?
Early Reader · Change the reading level on the articleTV signals fly from space. A satellite in the sky sends them down. A dish on your house catches them. This helps you watch many shows. It works even in far places. Do you have a dish?
Early Reader · Change the reading level on the articleThe Saturn V was a giant rocket. It was very big and strong. It helped people fly to the Moon. It carried many brave people into space. It was a great tool for science. Can you imagine flying in a rocket?
Early Reader · Change the reading level on the articleA saw is a tool. It has sharp teeth. These teeth cut through wood. You can use it to make things. It is very helpful. Do you like to build things?
Early Reader · Change the reading level on the articlePeople use tall frames to work high up. These frames help workers reach the top. They use poles and boards to stay safe. This helps them fix big buildings. It is very useful. Can you see a tall building near you?
Early Reader · Change the reading level on the articleA scale model is a small thing. It looks just like a big thing. It can be a car or a plane. Models help us learn and play. Do you like small toys?
Early Reader · Change the reading level on the articleThis is a special book. It shares new things we learn. It tells us about our world. Many people read it every week. It helps us learn more. Do you like to learn new things?
Early Reader · Change the reading level on the articleThis is a science magazine. It tells us about new things. It has been around a long time. It helps us learn about our world. Do you like to learn new things?
Early Reader · Change the reading level on the articleScissors help us cut things. They have two sharp blades. You squeeze the handles to use them. They can cut paper or cloth. They help us make things. Do you like to cut paper?
Early Reader · Change the reading level on the articleA screw is a metal tool. It helps hold things together. You twist it to make it stay. It can go into wood. It makes things strong. Can you find a screw?
Early Reader · Change the reading level on the articleA screw is a tool. It has ridges around it. You turn the screw to make it move. It can hold things tight. It helps us build things. Can you find a screw?
Early Reader · Change the reading level on the articleA search engine helps you find things. You type a word into it. Then, it shows you a list. These are web pages to see. It helps you learn new things. Do you like to search for things?
Early Reader · Change the reading level on the articleSmall parts help our tools work. They let power flow in a special way. These parts are in many things. They help computers run. We use them every day. Can you find one in your house?
Early Reader · Change the reading level on the articleA sensor helps machines feel. It sees things like light or heat. It can feel a touch, too. This helps tools work well. It makes our world better. Can you find a sensor?
Early Reader · Change the reading level on the articleSergei was a man who loved flight. He helped build big rockets. These rockets went into space. He helped send the first people up there. He was a very smart leader. Do you like to look at the stars?
Early Reader · Change the reading level on the articleA man named Sergey took color photos. He used a train to travel. He took many pictures of his home. He used three special pictures to make one color one. Now we can see his work. Can you see the colors?
Early Reader · Change the reading level on the articleDirty water needs to be clean. It goes to a special place. People clean the water there. This helps keep our world safe. It is good for the earth. Do you like clean water?
Early Reader · Change the reading level on the articleA sewing machine joins cloth together. It uses thread to make stitches. It is much faster than using your hands. This helps make clothes for us to wear. It is a very helpful tool. Do you like to sew?
Early Reader · Change the reading level on the articleA sextant helps you find your way. It looks at the sun and stars. It looks at the line where the sea meets the sky. This helps sailors know where they are. It is a very cool tool. Do you want to use one?
Early Reader · Change the reading level on the articleThese are fast trains in Japan. They move very quickly. They look like bullets. People use them to go to big cities. They help us travel far. Do you like fast trains?
Early Reader · Change the reading level on the articlePeople make big boats. They build them on land. Workers use wood or metal. These boats float on water. They help us travel far. Do you want to sail a boat?
Early Reader · Change the reading level on the articleThese were big ships for sea battles. They had many big guns. The ships sailed in a long line. This helped them fight together. They used the wind to move. Do you like big ships?
Early Reader · Change the reading level on the articleA mall is a big place to shop. It is a large building. Many stores are inside. You can walk and look at things. It is fun to go there. Do you like to shop at a mall?
Early Reader · Change the reading level on the articleA shotgun is a long tool. It can shoot many small bits. These bits spread out in the air. It helps people hunt fast birds. It can also hit flying disks. This tool is very strong. Do you want to learn more?
Early Reader · Change the reading level on the articleA shovel is a tool. It helps you dig. You can move dirt or snow. It has a long handle. It also has a strong blade. It helps us do big jobs. Can you use one to dig?
Early Reader · Change the reading level on the articleWe use waves to send news. These waves carry sounds and pictures. They travel through the air to you. This helps us talk to friends far away. It is like a fast invisible road. Can you hear the radio?
Early Reader · Change the reading level on the articleMachines help us hear and see. They fix sounds and pictures. This makes them look or sound good. It helps us talk on phones. It is very cool! Can you hear a phone ring?
Early Reader · Change the reading level on the articleSometimes it is hard to hear things. Background noise can hide a sound. We want the real sound to be loud. This helps us hear it well. Can you hear a whisper in a loud room?
Early Reader · Change the reading level on the articleSilicon Valley is a special place. It is in California. Many big tech companies work there. They make things like computers. This place helps us use new tools. Do you like computers?
Early Reader · Change the reading level on the articleA silo is a big tall tank. It holds lots of food for animals. It can also hold things like wood. This helps keep the food safe. Do you see any silos near you?
Early Reader · Change the reading level on the articleA sink is a bowl for washing. It has a tap for water. The water goes down a drain. You can wash your hands in it. It helps us stay clean. Do you use a sink every day?
Early Reader · Change the reading level on the articleA skyscraper is a very tall building. It reaches up toward the clouds. Many people work or live inside. These buildings help us use small spaces. They are amazing to see! Have you ever seen one?
Early Reader · Change the reading level on the articleA sled slides on ice or snow. It has a smooth bottom. This helps it glide. You can pull it with dogs. You can also go down hills. It is fun to ride! Do you like to slide?
Early Reader · Change the reading level on the articleA sling is a tool for throwing. It has two long strings. A small pouch sits in the middle. You put a stone in the pouch. Then you swing it in a big circle. The stone flies far away! Can you swing a stone?
Early Reader · Change the reading level on the articleA smartphone is a tiny computer. It fits in your hand. You can use it to talk. You can play games too. It helps us every day. Do you like using one?
Early Reader · Change the reading level on the articleWe get metal from rocks. First, we use a lot of heat. This heat helps pull the metal out. It leaves the bad parts behind. Now we have shiny metal! Can you find metal in your home?
Early Reader · Change the reading level on the articleComputers use special rules to talk. These rules send notes to each other. It helps them share facts. This helps us find things online. It is a smart way to work. Can you imagine computers talking?
Early Reader · Change the reading level on the articleYou can use computers to talk. You can share photos and videos. You can also make new friends. It helps us stay close. It is fun to learn new things. Do you like to share stories?
Early Reader · Change the reading level on the articlePeople make new computer programs. They plan how they work. They write the code. Then they check for mistakes. This helps tools work well for you. Do you like computers?
Early Reader · Change the reading level on the articleSunlight can make power. Special cells catch the light. They turn it into electricity. This helps us run things. It can even power cars! Can you see the sun today?
Early Reader · Change the reading level on the articleWe can get power from the sun. Solar panels catch the light. This light makes electricity for us. It can power your home. It is a clean way to work. Do you like the sun?
Early Reader · Change the reading level on the articlePeople use heat to join metal. They melt a soft metal onto parts. This metal makes a strong bond. It helps fix toys and tools. It can even fix wires! Do you like to fix things?
Early Reader · Change the reading level on the article