Make Your Compressed Air Tennis Ball Cannon

What happens when you find your ball deflated and there's no pump or needle in sight? You could always cancel your plans of kicking around the soccer ball or starting that pickup football game in the park. Better yet, you could be terribly clever and find another way to get ai ...more

Write about what you LOVE. EARN money for it. In this week's edition of Friday Fresh, we're doing a little something different. You may have noticed our banner touting our Love. Earn program, and a new section called New Articles By You. New articles on topics as varied as sn ...more

get a big log or roller. jackass members will have to try their best to stay on the spinning roller while being shot by a tennis ball cannon over a pool of horse crap

X amounts of bear mace , 5 mini mini motorcyles , 1 bam , 1 danger , 1 knoxville , 1 ryan dunn , and the one and only steve-o ... now in an enclosed area or a busy Los Angles street (rodeo dr.) whatevers easier , each member must be sprayed with ther bear mace while trying to ...more

We've seen compressed air power a homemade rocket, shoot erasers across the room, and even remove dents from a vehicle, but how about breaking a bike lock? As Theodore Gray of PopSci explains, no matter how tough your lock is, there's one thing that will defeat it every time— ...more

First off, don't be frustrated. YOU CAN DO IT! Contrary to the message in the image above, it's NOT over. It's just beginning. And when it comes to solving the New York Times crossword puzzle, the old cliche does apply: practice makes perfect. I've read quite a few books and ...more

Locking your keys inside of your car is frustrating, to say the least, especially if you're in a hurry to get somewhere. You can always call AAA roadside assistance or a locksmith, but you'll probably have to fork over some money, as well as wait for them to get to you. You mi ...more

A spare key is one of those things that never seems like a huge deal until you need it. If you've ever lost your keys, had them stolen, or locked yourself out of your house or car, you know how difficult and embarrassing it can be trying to get your door open. So, how would y ...more

Many of you are ready to capture the litany of 4th of July fireworks that will litter the night sky, but if you're using a phone to capture the burst of fire in midair, it can get a little tricky. Don't worry, though — you'll be fine if you use these tips. While pro and semi- ...more

This summer's going to be a hot one, so skip the water pistol this year and break out the big guns! In this project, I'll be showing you how to build a water balloon shotgun—a high-powered water balloon launcher that's capable of firing 17 water balloons at the same time! Vide ...more

The video featured in this article demonstrates the function and design of a powerful form of air cannon that operates using a purpose made valve that opens very rapidly. This allows for a massive amount of pressurized air to be released at once to throw a projectile many hund ...more

In this project, you'll learn how to re-purpose low-cost sprinkler parts into a high-powered CANDY CANNON. Be the coolest person on the block by building a pneumatic device that will launch candy 100 feet in the air—you can make it rain down all kinds of sugary treats!!! It's ...more