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 43 of 86
Machines can move heat. They can move heat from one place to another. This makes things cold or warm. This helps keep your food cold. It can also keep your home warm. It is like magic! Do you have a fridge at home?
Early Reader · Change the reading level on the articleA heavy bomber is a big plane. It can carry many bombs. It can fly for a long time. These planes help in wars. They are very strong and loud. Do you like big planes?
Early Reader · Change the reading level on the articleBig machines do hard work. They move lots of dirt. They help build roads. These machines help us every day. They make big jobs fast. Do you like big trucks?
Early Reader · Change the reading level on the articleHeinrich Vollmer made tools for soldiers. He made many kinds of guns. He made new parts for them. These parts helped the guns work well. His work was very smart. Can you imagine making new things?
Early Reader · Change the reading level on the articleHelena Rubinstein made skin cream. She sold it in shops. Her cream helped people look nice. She used her money to help others. She was a very smart boss. Do you like to help people?
Early Reader · Change the reading level on the articleHelen was a news writer. She went to the White House. She asked the leaders many questions. This helped people know the news. She was very good at her job. Do you like to ask questions?
Early Reader · Change the reading level on the articleA helipad is a place to land. It is a flat, hard spot. It often has a big H on it. This helps pilots see it. It is used by many flying machines. It helps people get help fast. Can you see it from the sky?
Early Reader · Change the reading level on the articleA red laser makes a bright beam. It uses two kinds of gas. One gas helps the other. This makes a strong red light. It can help scan things. Do you like bright lights?
Early Reader · Change the reading level on the articleThis is a big news paper. It comes from a city called Helsinki. People in Finland read it every day. It tells us what is happening. It helps us know the news. Do you like to read the news?
Early Reader · Change the reading level on the articleThe Helsinki Metro is a fast train. It runs in Finland. Some tracks are under the ground. Some tracks are above the ground. It helps many people travel. It is a very cool way to ride! Do you like trains?
Early Reader · Change the reading level on the articleHendrik Bode was a smart man. He worked with machines. He helped make tools for space. He also helped with tools for phones. His work helps us today. Do you like machines?
Early Reader · Change the reading level on the articleHenri Fayol was a smart man. He worked in big mines. He helped people work well in teams. His ideas helped many big companies. This helped many workers. Do you like working in a team?
Early Reader · Change the reading level on the articleHenri Nestlé made food for babies. He made a special milk powder. It helped many small children. It was easy to make with water. This helped families stay healthy. Do you like milk?
Early Reader · Change the reading level on the articleHenry Bessemer was a smart man. He made a way to make steel. He used air to clean the metal. This made steel cheap and easy to make. It helped us build big things. Did you know he made many things?
Early Reader · Change the reading level on the articleHenry Clay Frick was a rich man. He made steel for big buildings. He also loved beautiful art. He gave his art to a museum for us to see. It is a very grand place. Do you like to look at art?
Early Reader · Change the reading level on the articleHenry Flagler was a busy man. He helped build big businesses. He also built many trains in Florida. He helped make new cities. His work changed the land. Do you like trains?
Early Reader · Change the reading level on the articleA man named Henry made the first photos. He used special paper. He used light to make pictures. This helped us see things in a new way. It was a big discovery. Do you like looking at photos?
Early Reader · Change the reading level on the articleHenry Rogers was a busy man. He worked with oil. He also worked with trains. He helped build many things. He was a good friend to people. Do you like to build things too?
Early Reader · Change the reading level on the articleHenry Heinz made food in jars. He sold pickles and more. His food helped many people. He made a big food company. It is still here today. Do you like pickles?
Early Reader · Change the reading level on the articleHenry Kaiser was a builder. He built big ships. He also built big dams. He helped make doctors for his workers. This helped many families stay well. He did many big jobs. Do you like to build things?
Early Reader · Change the reading level on the articleHenry Luce made many magazines. He started Time and Life. People read his books to learn news. His work helped many people. He was a very busy man. Do you like to read magazines?
Early Reader · Change the reading level on the articleHenry Royce built great engines. These engines helped cars and planes move. He worked very hard to make them good. His work helped people travel far. He was a very smart man. Do you like fast cars?
Early Reader · Change the reading level on the articleHenry Sutton was a smart man. He lived a long time ago. He made many new things. He made a car and a radio. He even made a phone! He loved to learn. Can you think of something new?
Early Reader · Change the reading level on the articleHenry Wells was a busy man. He helped move mail and goods. He started big companies. These companies still exist today. He also helped start a school for women. Do you like to help people?
Early Reader · Change the reading level on the articleA special filter cleans the air. It catches tiny bits of dust. It also catches small germs. This helps keep our air clean. It is used in many homes. Does your home have a clean air filter?
Early Reader · Change the reading level on the articleHerb was a news man. He spoke on the radio. One day, a big airship had a fire. Herb felt very sad. He cried as he told the news. People all over the world heard him. Do you like to listen to news?
Early Reader · Change the reading level on the articleA man named Herman made a new tool. It used cards with holes in them. The holes helped count things fast. This helped people learn about many folks. It was a big help for our world. Do you like to count things?
Early Reader · Change the reading level on the articleHermann Oberth loved rockets. He read books about the moon. He even built a small rocket. He had big ideas for space. His work helps us fly high. Do you like looking at the stars?
Early Reader · Change the reading level on the articleHetty Green was a very rich woman. She was good at business. She knew how to save her money. This helped many people when they were in trouble. She was a leader in a man's world. Do you like to save your money?
Early Reader · Change the reading level on the articleHP is a big company. Two men started it in a garage. They made tools for sound. They also make computers and printers. These things help us work. Do you use a printer?
Early Reader · Change the reading level on the articleComputers use this to save things. It keeps your files in order. It helps big disks work well. This makes your computer fast. It is very helpful for you. Do you like using computers?
Early Reader · Change the reading level on the articleA hidden camera is a small tool. It takes pictures or videos. It can be inside a clock. You might not see it at all. It helps keep things safe. Do you know where it is?
Early Reader · Change the reading level on the articleNew TVs show very clear pictures. They use many tiny dots to make an image. These dots make the picture look sharp. It helps you see things better. It even helps fast things look smooth. Do you like watching TV?
Early Reader · Change the reading level on the articleSome tools can break through thick metal. They use a quick blast to work. This blast pushes metal into a fast stream. The stream cuts through the armor. It helps people stay safe. Do you want to see more?
Early Reader · Change the reading level on the articlePeople use special words to talk to computers. These words help us tell computers what to do. It is easier than using hard math. This helps us make new things. It is a fun way to work. Do you like computers?
Early Reader · Change the reading level on the articleA filter picks some sounds. It lets fast sounds go through. It stops slow sounds. This helps music sound good. It can even help pictures look sharp. Do you like fast music?
Early Reader · Change the reading level on the articlePeople build roads for us. They make paths for cars. These paths help us go places. They must be very strong. We need them to stay safe. Do you like to ride in a car?
Early Reader · Change the reading level on the articleHikvision makes cameras. These cameras watch things. Some people use them for safety. Other people are worried about them. Some countries do not want to use them. Do you use cameras to stay safe?
Early Reader · Change the reading level on the articleHilton is a big hotel company. They have many places to stay. You can find them in many lands. They help people rest on trips. It is a very big group. Do you like to stay in hotels?
Early Reader · Change the reading level on the articleA hinge helps things move. It joins two parts together. It lets a door swing open. It can also work like your elbow. Hinges are very helpful. Do you see a hinge at your house?
Early Reader · Change the reading level on the articleA man named Hippodamus lived long ago. He built cities with straight roads. The roads crossed like a grid. This helped the cities stay neat. He wanted towns to be in order. Do you like neat streets?
Early Reader · Change the reading level on the articleHiram Maxim was a man who made things. He made many tools and machines. He even made a ride for fun. He tried to make things that fly. Can you think of something you made?
Early Reader · Change the reading level on the articleHiroshi Amano is a smart man. He helped make blue lights. These lights help make white light. This helps us see in the dark. He worked very hard at his job. Do you like bright lights?
Early Reader · Change the reading level on the article{ "text": Trams help people move in a city. They run on tracks in the street. Some trams are very old. They still run today. They help us go to many places. Do you like to ride trams? ", "media": […
Early Reader · Change the reading level on the articleHiroshi Yamauchi led a big game company. It was called Nintendo. He helped make many video games. He also owned a baseball team. He worked very hard for his company. Do you like to play games?
Early Reader · Change the reading level on the articlePeople have long dreamed of thinking machines. Long ago, stories told of metal men. Now, we build smart computers. These machines help us solve big problems. They can even talk to us! Do you think a machine can think?
Early Reader · Change the reading level on the articlePeople want to make life. They try to make machines that act like living things. Some old machines could even move. Some could even play music. Now, we use computers to help. Can you imagine a robot that acts like a pet?
Early Reader · Change the reading level on the articlePeople use tiny living things to make things. They used them to make beer long ago. Now they make medicine to help us. This helps keep us healthy and strong. It is very cool! Do you like science?
Early Reader · Change the reading level on the article