検索キーワード： 物事の仕組み

From hospital and police codes to Cockney slang, spoken codes can be both helpful and entertaining. Learn the history behind some of today’s most useful and popular codes, and then have fun creating a language all your own.

Tractors, wagons, combines, and trailers—what are these things? They’re all machines on a farm! How do they work? What are they for? Kids can get to know the many machines that make farms go in this Pebble Sprout series.

A coat is made from different types of fabric, but could it be made with wood? It seems impossible, but wood has many advantages, and is used for everything from building houses to making toys. Learn more about different types of wood and their many uses. Could it really be used to make a coat?

ATVs tackle the toughest land around, but there are lots of ways to make these vehicles faster and cooler. Listeners will love finding out how!

Plastic is in lots of items you use every day. Find out about different types of plastic, what they are used for, and if you could really make a toaster from it.

ATVs tackle the toughest land around, but there are lots of ways to make these vehicles faster and cooler. Listeners will love finding out how!

A diamond is shiny. A brick wall is dull. Why are some objects shiny and others dull? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between shiny and dull objects.

A bowling ball is heavy. A feather is light. Why are some items heavy and others light? Find out in this series about materials and their properties. Informative, at-level text helps listeners understand the differences between heavy and light materials.

Did you see a flagpole today? Then you’ve seen a pulley at work! These simple machines are all around. Take a listen and discover 13 different uses for pulleys.

Imagine you arrive at school and realize you forgot to feed the dog. No problem. Pull out your phone and command the dog dish to dispense a serving of food. That's all there is to it—if you live a smart home. What once sounded like science fiction is now a reality for some families.

A virtual assistant by any name—Alexa, Siri, whoever—can be a sweet addition to your home. You might use one for simple jobs like playing music or streaming podcasts. And you might use one to communicate with friends and remind you about homework coming due while helping you make your breakfast. Find out how digital assistants work and what the future might hold for this part of a high-tech home.

Did you put the cap on the toothpaste tube today? Then you’ve used a screw! These simple machines are all around. Take a listen and discover 13 different ways we use screws.

Did you use a fork today? Then you’ve used a lever! These simple machines are all around. Take a listen and discover 13 different ways we use levers.

The United States keeps its gold safe at Fort Knox. How is this done? There are fences, locks, guards, and more. Learn more about this high-security place!

Air Force One keeps the U.S. president safe while flying. Learn more about the features that protect this amazing plane. Also find out how team members protect the president as he travels on Air Force One.

How can important information and valuable items be kept safe as years pass? Many of these items are stored in underground vaults, including recordings and photos from U.S. history, important documents, and more. Locks, guards, secret passwords, and technology all play a part in the protection of the items.

Nuclear weapon bunkers keep the world's dangerous nuclear weapons safe. Guards, electronic security systems, and barriers protect the bunkers. Learn more about these high-security places!

Streaming puts a world of options at your fingertips when you’re at home and, with a smartphone or tablet, when you're on the go. Find out how streaming was invented, how it works, and what the future might hold for this part of a high-tech life.

The wheel was invented more than 5,000 years ago, and it has brought some awesome vehicles our way. But this invention isn't done giving! Take a tour of some of the most unique and fascinating vehicles around.

Did you ride a bike today? Then you’ve used wheels and axles! These simple machines are all around. Take a listen and discover 13 different ways we use wheels and axles.