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How does a master key work?

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A master key can open many different types of locks. Find out how a master key works.

What makes super glue so super?

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What makes super glue so super? How is it different from regular glue? Learn about super glue and what would happen if you glued your fingers together.

How Vacuum Cleaners Work

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Vacuum cleaners have cleaned our homes for over a century. See a vacuum cleaner from the inside out and read expert reviews about vacuum cleaners.

How Bug Zappers Work

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Bug zappers can help keep your backyard free of pesky insects. Find out how bug zappers kill insects and take a look at the inside of a bug zapper.

How does the Downy fabric-softener ball work?

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How does the Downy fabric-softener ball work? Learn about the Downy fabric-softener ball.

How do spray bottles pump fluid?

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How do spray bottles (like the ones used for cleaning products) pump fluid? Why do you have to pump them a couple of times before they start spraying?

How Espresso Machines Work

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Espresso, cappuccino, latte, double latte, double mocha latte... Espresso drinks have become coffee-shop staples all over the world. Watch us take apart an espresso machine!

Why are barns usually painted red?

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Red barns are a common sight in rural parts of the country, but have you ever wondered why they're painted red? Learn about the purpose of red barns.

What Is Compost? How to Start Composting at Home

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Americans generate more than 200 million tons of trash each year. Want to put some of it to work? Try composting. It creates a natural fertilizer and can save valuable space in that landfill.

Why do the entry doors to most homes open inward, while in most public buildings, the entry doors open outward?

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Have you ever noticed that in most all homes, the entry doors open inward, but in most public buildings, the entry doors open outward. Why is this? Read this article to find out.