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 21 of 86
A bag helps you carry things. You can use them for food. They can be made of paper or cloth. Some bags have handles to hold. They help us move many things at once. Do you have a favorite bag?
Early Reader · Change the reading level on the articleBaggage is what we use to travel. It holds your clothes and things. Some bags have wheels to help you move. You can carry small bags with you. These bags keep your things safe. Do you have a bag for trips?
Early Reader · Change the reading level on the articleBaidu is a big company. It helps people find things online. They also make cars that drive themselves. This helps people get around. It is very neat! Do you use the internet to find things?
Early Reader · Change the reading level on the articleA balcony is a floor outside. It sticks out from a wall. It can be part of a house. You can go there for fresh air. It lets the light in. It is a fun place to be. Do you like to go outside?
Early Reader · Change the reading level on the articleA baler is a big farm machine. It squishes cut grass into tight bundles. These bundles are easy to move. They keep the food good for animals. It is a very helpful tool. Do you want to see a bale?
Early Reader · Change the reading level on the articleA ball joint helps cars move. It works like your hip. It lets wheels turn and move up and down. This makes the ride smooth. It helps you steer the car. Can you find a car?
Early Reader · Change the reading level on the articleBalloons are fun bags. They can be filled with air. Some balloons can even float. They make parties look great. We use them to celebrate. Do you like balloons?
Early Reader · Change the reading level on the articleSantander is a big bank. It helps people with money. This bank is from Spain. It works in many places. It helps people all over the world. Do you have a bank?
Early Reader · Change the reading level on the articleSome tools pick only certain sounds. They let some sounds through. They block other sounds out. This helps us hear the right thing. It can work with light, too. Can you think of a sound you like?
Early Reader · Change the reading level on the articleThis is a very big bank. It helps people with their money. It has many offices in many places. It helps many people every day. It is a very large company. Do you have a bank?
Early Reader · Change the reading level on the articleThis big bridge goes over a river. It has two levels for cars. It has a very long water show. The lights dance to music. It is a fun place to visit. Do you like water shows?
Early Reader · Change the reading level on the articleBarbara Liskov works with computers. She helps make them work better. She writes new ways for computers to talk. Her work helps us use technology every day. She is a very smart scientist. Do you like computers?
Early Reader · Change the reading level on the articleA grill cooks your food. It uses heat from below. Some use gas. Some use coal. Some use power from a plug. It makes food taste good. Do you like to eat outside?
Early Reader · Change the reading level on the articleThis is barbed wire. It is a metal wire. It has sharp points. These points keep animals away. It helps farmers protect their food. It is a very strong fence. Do you see the sharp points?
Early Reader · Change the reading level on the articleTrains run under the ground in a big city. These fast trains help people move. They go to many places. You can ride them to see the city. It is a fun way to travel. Do you like fast trains?
Early Reader · Change the reading level on the articleA barrel is a big round tub. It can hold water or juice. People use them to keep food safe. It helps things stay good for a long time. Do you like juice in a tub?
Early Reader · Change the reading level on the articleBarry Gray was a radio man. He talked to people on the air. He helped start talk radio. This was a new way to listen. Many people liked his shows. Do you like to listen to the radio?
Early Reader · Change the reading level on the articleWe use power every day. Some plants make power all the time. They do not stop. This helps keep our lights on. It is a steady flow of power. It matters to you and me. Can you turn on a light?
Early Reader · Change the reading level on the articleA basement is a floor below the ground. It can hold things you do not use. It can also keep a house safe. Some basements have big windows. You can even play there! Do you have a basement in your house?
Early Reader · Change the reading level on the articleBASF is a very big company. It makes many things. It makes things for many lands. It helps many people work. This company is very old. Do you like colors?
Early Reader · Change the reading level on the articleWe make steel from hot iron. Workers blow air into the metal. This helps make the iron into steel. It is very fast. This helps us build big things. Do you like things made of steel?
Early Reader · Change the reading level on the articleA basket is a small box. People make them by hand. They use long bits of plants. You can use one to carry food. Some have a lid on top. Do you have a basket at home?
Early Reader · Change the reading level on the articleA bastion is a part of a fort. It sticks out from the wall. It helps keep the fort safe. It lets people see everything. This helps them protect their home. Do you like old forts?
Early Reader · Change the reading level on the articleSome forts look like stars. They have pointy walls. These walls help keep people safe. The points stop bad spots. This helps people look out. Do you like star shapes?
Early Reader · Change the reading level on the articleThings are made in small groups. Each group is made at one time. This helps people check for mistakes. It is easy to change things. This can save money too. Do you like making things in groups?
Early Reader · Change the reading level on the articleA big tank makes new things. It is like a recipe. We put things in and stir them. It can get hot or cold. This helps make medicine. Can you imagine a giant pot?
Early Reader · Change the reading level on the articleElectric cars use big batteries. They do not use gas. You plug them in to get power. This helps keep our air clean. It is a smart way to go. Do you like electric cars?
Early Reader · Change the reading level on the articleMachines use signals to talk. These signals move very fast. We can count how many signals go by. This helps us know the speed. It helps our tools work well. Can you imagine fast signals?
Early Reader · Change the reading level on the articleBayer is a big company. It makes things to help people. They make medicine like aspirin. This helps when you feel sick. They also help plants grow. It is a very old company. Do you know someone who takes medicine?
Early Reader · Change the reading level on the articleB. C. Forbes was a writer. He wrote for many papers. He also started a big magazine. He wrote many books too. His work helps us learn. Do you like to read books?
Early Reader · Change the reading level on the articleBeate was a brave pilot. She loved to fly planes. She even flew in movies. Later, she started a big shop. Her shop helped many people. Do you like to fly?
Early Reader · Change the reading level on the articleSpace tools help us find our way. They fly high in the sky. They tell us where we are. This helps us use maps. It is very helpful for us. Can you find your way home?
Early Reader · Change the reading level on the articleThis is a very big airport. It is in a city called Beijing. Many planes land and take off here. It helps people fly to far places. It is a busy place to see. Have you ever flown in a plane?
Early Reader · Change the reading level on the articleThe Beijing subway is a big train system. It has many lines. The trains go under the ground. It helps many people move around the city. It is very long. Do you like riding trains?
Early Reader · Change the reading level on the articleA belfry is a tall place for bells. It is often part of a big tower. The walls have holes to let the sound out. This helps everyone hear the loud ring. It is a very cool building. Do you like the sound of bells?
Early Reader · Change the reading level on the articleA belt is a long loop. It goes around wheels. The wheels spin the belt. Then the belt spins other wheels. This helps machines work. It can move things along. Do you see belts on machines?
Early Reader · Change the reading level on the articleCompanies look at how others work. They want to do a great job. They see what the best do. Then they try to do it too. This helps them get better. Do you want to be the best?
Early Reader · Change the reading level on the articleBenjamin Holt was an inventor. He made special machines. These machines had tracks like a belt. They could drive on soft ground. This helped farmers do work. His machines were very good. Do you like big machines?
Early Reader · Change the reading level on the articleBen Smith tells news stories. He works at a news site. He writes about many things. His work helps us learn. He is a busy writer. Do you like to read news?
Early Reader · Change the reading level on the articleMany computers work together. They help smart people learn. They study stars and tiny germs. This helps our whole world. It is a big team. Can you help too?
Early Reader · Change the reading level on the articleBerkshire Hathaway is a big company. It owns many other businesses. They own candy shops and ice cream places. They also own many newspapers. This company helps many people work. Do you like candy or ice cream?
Early Reader · Change the reading level on the articleTrains run under the city. They carry many people. The trains move on tracks. This helps people get around. It is very fast. Do you like train rides?
Early Reader · Change the reading level on the articleBernard Arnault is a man who sells fine things. He runs a very big company. He owns many famous brands. His work helps people buy pretty clothes and jewelry. He is very good at his job. Do you like fancy things?
Early Reader · Change the reading level on the articleBernard Kroger helped us shop. He made big food stores. You could walk in and pick food yourself. He also sold fresh bread and meat. This helped many families. Do you like to shop for food?
Early Reader · Change the reading level on the articleBertha Benz loved new things. She helped make the first car. She drove a car a long way. This helped many people see the car. It was a big deal. Do you like cars?
Early Reader · Change the reading level on the articleBertrand Piccard is a man who loves to fly. He flew a big balloon around the world. He also flew a plane that uses the sun for power. He helps our Earth stay clean. Do you like to fly?
Early Reader · Change the reading level on the articlePeople use air to make steel. They blow air into hot iron. This cleans the iron. It makes the iron strong. We use steel for many things. Do you like things made of steel?
Early Reader · Change the reading level on the articleBetty Holberton worked with computers. She helped make them work. She was very smart. Her work helps us today. Do you like computers?
Early Reader · Change the reading level on the article