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 74 of 86
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Planes have parts to stay steady. These parts are at the back. They help the plane fly straight. They help the plane stay level. This keeps the ride smooth for you. Do you like to fly in planes?
Early Reader · Change the reading level on the articleA stack is like a pile. You put things on the top. You take things from the top too. It is just like plates. This helps computers work. Do you like stacks of toys?
Early Reader · Change the reading level on the articleBig roads meet in a special way. They use many layers to cross. Cars can go fast without stopping. This helps many cars move well. It is like a tall stack of roads. Have you seen a big road like this?
Early Reader · Change the reading level on the articleThis tool helps us see how far things are. You look through it at a tall thing. It uses how tall the thing is to find the distance. This helps ships stay at the right spot. It is very handy! Can you find a tall thing…
Early Reader · Change the reading level on the articleA stagecoach is a big carriage. It has four wheels. Horses pull the coach. It carries people and bags. People use it to travel far. It is a fun way to go. Would you like to ride in one?
Early Reader · Change the reading level on the articleA stamp mill is a big machine. It hits hard rocks. It uses heavy parts to crush them. This helps us find metal. It works like a big hammer. Can you imagine that loud sound?
Early Reader · Change the reading level on the articleStanley Ho was a very rich man. He owned many big buildings. He also owned many fun places to play. His work helped many people find jobs. He loved to dance, too. Do you like to dance?
Early Reader · Change the reading level on the articleStarbucks is a big coffee shop. It started in a city called Seattle. Many people go there for drinks. They sell hot and cold drinks. They also have snacks to eat. Do you like yummy snacks?
Early Reader · Change the reading level on the articleThere is a big stone bridge. It goes over a river. It helps people cross the water. People even jump into the river from it! It is a very special place. Do you like to jump in water?
Early Reader · Change the reading level on the articleA startup is a new business. It starts with a big idea. The idea helps solve a problem. Some startups grow very large. It can be hard work to start one. Do you have a big idea?
Early Reader · Change the reading level on the articleA big company moves power. It sends light to homes. It works in many lands. This helps people use tools. It is a very large group. Do you use lights at home?
Early Reader · Change the reading level on the articleA paper shows money changes. It tracks what a business owns. It shows if money was made or lost. This helps people see how things grow. It is a very helpful tool. Do you like to count money?
Early Reader · Change the reading level on the articleSome chips help computers think. They hold tiny bits of info. They work very fast. This helps your toys and games. They need power to work. Do you use a computer?
Early Reader · Change the reading level on the articleThis is a bike for inside. It has no wheels. You sit on a seat. You move the pedals with your feet. It helps you stay fit. It is good for your heart. Do you like to ride bikes?
Early Reader · Change the reading level on the articleA station wagon is a big car. It has a long roof. You can fit many things inside. You can also fit many people. It helps you carry your bags. Do you like big cars?
Early Reader · Change the reading level on the articleA steamboat uses steam to move. It can go on rivers. It can go on lakes too. These boats help us travel. They are very cool! Do you like boats?
Early Reader · Change the reading level on the articleA steamroller is a big machine. It has heavy, smooth wheels. It rolls over the ground. It makes roads flat and smooth. This helps us drive on roads. Do you like big machines?
Early Reader · Change the reading level on the articleSteam is a place for games. You can find many games here. It helps your games stay new. It also keeps your games safe. It is a fun place to play. Do you like to play games?
Early Reader · Change the reading level on the articleA long time ago, people built a path for boats. This path moved salt from place to place. It used small rivers to help. The boats carried things like wood and food. It helped people trade. Do you like boats?
Early Reader · Change the reading level on the articleA can is a metal box. It holds food and drinks. It keeps food safe for a long time. You can use it to eat. It is very helpful. Do you like canned food?
Early Reader · Change the reading level on the articleSteering helps you go where you want. It moves the wheels or the nose. A driver turns a wheel to move. This helps cars and boats turn. It makes travel fun and safe. Do you like to steer your toys?
Early Reader · Change the reading level on the articleA steering wheel helps a car turn. It is a round part. The driver holds it with their hands. This helps the car go where you want. It makes driving easy. Do you like to go for rides?
Early Reader · Change the reading level on the articleYou can hide a secret message. It can be inside a picture. It can be in a song. No one will know it is there. It looks like a normal thing. Do you like secrets?
Early Reader · Change the reading level on the articleStephen Cook is a smart man. He studies how computers work. He helps us learn what computers can do. His work helps many people. He is a great teacher. Do you like computers?
Early Reader · Change the reading level on the articleStern is a news magazine. It comes from a place called Germany. It has many pretty pictures. People read it to learn about the world. It helps us see what is happening. Do you like to read news?
Early Reader · Change the reading level on the articleSteve Ballmer is a busy man. He helped run a big computer company. He also owns a basketball team. He works hard to help many people. Do you like basketball?
Early Reader · Change the reading level on the articleSteve Chen helps us watch videos. He helped start YouTube. He worked with computers. This site helps us see many things. It is fun to use. Do you like watching videos?
Early Reader · Change the reading level on the articleSteve Fossett loved to go on trips. He flew in big balloons. He also sailed fast boats. He set many world records. He was a brave man. Do you like to explore?
Early Reader · Change the reading level on the articleSteve Shirley worked with computers. She built them from parts. She helped many women find jobs. She also gave money to help others. She was a very kind person. Do you like computers?
Early Reader · Change the reading level on the articleSteve Wynn builds big hotels. He makes them look very nice. He also likes to buy art. These big hotels help many people travel. Do you like big hotels?
Early Reader · Change the reading level on the articleStewart Brand is a writer. He loves our world. He helped make a big book of tools. This book shows how to help the Earth. He wants us to take care of our home. Do you love the Earth too?
Early Reader · Change the reading level on the articleStilson Hutchins started a news paper. He lived a long time ago. He was not kind to all people. This made things hard for some. He built a big home on an island. Do you like to read news?
Early Reader · Change the reading level on the articleThis engine uses heat to move. It uses air to work. Heat makes the air grow. This pushes a part to make it move. It is very quiet. Can you hear it? It is a smart way to use heat.
Early Reader · Change the reading level on the articleA stirrup helps you ride a horse. It is a small ring. It hangs from the saddle. You put your foot in it. It helps you stay steady. It makes riding much better. Do you like horses?
Early Reader · Change the reading level on the articleTrains run under the city in Sweden. Many trains go through long tunnels. Some tracks are above the ground. The stations have pretty art. It is like a big art gallery! Do you like art?
Early Reader · Change the reading level on the articlePeople use stone to build things. They make walls and big houses. They can even make art. Stone lasts a long time. It helps us make strong roads. Do you like looking at stone?
Early Reader · Change the reading level on the articleLong ago, people used stone. They made tools from rock. They hit rocks to make sharp edges. These helped them work. They could cut things. Do you like rocks?
Early Reader · Change the reading level on the articleA stop sign tells cars to wait. It is often red with eight sides. It helps keep us safe on the road. We see them at corners. It is a very helpful sign. Do you see them when you go for a ride?
Early Reader · Change the reading level on the articleA stopwatch tells how much time goes by. You press a button to start it. Press it again to stop it. It helps us time fast races. It is a fun tool to use. Do you want to try it?
Early Reader · Change the reading level on the articleA computer can hold its own rules. It keeps these rules in its memory. This helps it do many jobs. It is how we use computers today. It is a very smart way to work. Do you use a computer?
Early Reader · Change the reading level on the articleThis engine has parts in a row. All the parts line up straight. It is easy to build. It is also quite thin. This helps cars and planes move. Do you like fast cars?
Early Reader · Change the reading level on the articleA straight razor is for shaving. The sharp blade folds into a handle. Long ago, people used shells or teeth. Now, many people use electric tools. Do you know how people shave?
Early Reader · Change the reading level on the articleBig planes fly very far. They carry many heavy things. They drop these things on far places. This helps in a war. These planes are very large. Can you see the big wings?
Early Reader · Change the reading level on the articleYou can watch videos online. The video plays right away. It does not wait to finish. This helps you see things fast. It is fun to watch! Do you like watching videos?
Early Reader · Change the reading level on the articleYou can watch shows on the web. It sends shows to your screen. It works through the internet. This helps you watch movies at home. It is very fun to use. Do you like to watch shows online?
Early Reader · Change the reading level on the articleA street is a way to move. It has buildings on the sides. You can walk on the path. Cars and bikes use it too. Streets help us meet our friends. Do you see a street near you?
Early Reader · Change the reading level on the articleMany things sit on our streets. Benches help us rest. Lights help us see at night. Bins keep the ground clean. These things help us every day. Do you see them on your walk?
Early Reader · Change the reading level on the articleA gutter is a low path by the road. It catches rain water. The water flows into a drain. This keeps the street dry. It helps you walk without puddles. It helps cars stay safe too. Do you see a gutter near you?
Early Reader · Change the reading level on the article