Here’s how to make dry-ice at home, or wherever you feel like it! All you need is a pillow case, and a CO2 fire extinguisher.

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Endcard Links:

Fun With Dry-Ice: http://bit.ly/DryIceCream
Liquid Nitrogen: http://bit.ly/FunWithLN2
Balloon Cannon: http://bit.ly/WaterCannon
Exploding H2O: http://bit.ly/H2OExplode

Music By:
Music by Jason Shaw (RP-5CentsBack)
http://www.audionautix.com

Project Inspired By:

Theo Gray (Mad Science) http://youtu.be/gyLwYin6pRo

WARNING:

Dry Ice is extremely cold! (-78C/-109F) and can cause instant frost-bite to exposed skin. This project should not be attempted without adult supervision and adequate training. Misuse, or careless use, of tools or projects may result in serious injury. Use of this video content is at your own risk.

Project History & More Info:

It cost just under $30 to refill the tank to get about 2 lbs of dry-ice. Contrasting that with the cost of dry-ice at the local grocery store ($1.00/lb) doesn’t make financial sense, but this method is much more fun!

If pressurized liquid CO2 is quickly depressurized, the CO2 expands to a gas, and cools its surroundings. This is called adiabatic cooling. Because the CO2 sublimates directly into a gas, it’s very clean and doesn’t leave behind any residue.

Some fire extinguishers utilize CO2 as the medium for suppressing fires. These types are mainly found in restaurant kitchens, mechanical rooms, and in areas that hold sensitive equipment like computers.

CO2 fire extinguishers are usually charged with food grade CO2 and are referred to in terms of pounds. For example, a 5lb CO2 extinguisher is charged with a 5 lb weight of liquid CO2.

CO2 fire extinguishers are marked with stickers, or holes punched in the servicing labels. They also have unusually large discharge horns, and no pressure gauges.

The challenge is simple .. just balance 14 nails on one nail head … at the same time!

In this project you’ll learn how to make a fun little mind puzzle, for giving as a gift, or for entertaining guests. You’ll also learn the secret to getting all nails these to balance at once!

Free template: https://www.dropbox.com/s/omb0ofgnzaivzmo/Gravity%20Puzzle%20%28Brain%20Game%29%20-%20Nail%20base%20template.pdf

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Endcard Links:

Mousetrap Gun: http://bit.ly/MousetrapGun
Green Slime: http://bit.ly/NinjaTurtleOoze
Paper Speaker: http://bit.ly/PaperPlateSpeaker
Balloon Cannon: http://bit.ly/WaterCannon

Music By:
Kevin Macleod (Riptide)
http://www.incompetech.com

Project Inspired By:

A family friend showed me this during my teenage years. I never did figure it out myself .. he had to show me the solution, and it’s amazingly simple once you know it!

WARNING:

If using power tools in this project, adult supervision and adequate training are highly recommended. Misuse, or careless use, of tools or projects may result in serious injury, death, and/or permanent damage to persons, equipment and property. Use of this video content is at your own risk.

While this trick has probably been around since before any of us were born, most people still don’t know how do it!

Project History & More Info:

THE RULES: Balance 14 nails on one nail head. The nails can’t touch anything except each other, and they all have to be balancing at the same time.

Bring out the big guns! Have you ever seen a water balloon shotgun? Here’s how to make a High Powered Water Balloon Shooter that will fire 17 balloons at once!

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Endcard Links:

Candy Cannon: http://bit.ly/CandyCannon
Mousetrap Gun: http://bit.ly/MousetrapGun
H2O Explodes: http://bit.ly/H2OExplode
Rocket Rifle: http://bit.ly/HandheldRocketRifle

Music By:

Kevin Macleod (Breakdown)
http://incompetech.com/

Project Inspired By:

This was an original idea. Original to me anyway.

WARNING:

Adult supervision and adequate training is recommended. Misuse, or careless use, of equipment or projects may result in serious injury, property damage, and/or death. Use of this video content is at your own risk.

Project History & More Info:

Here’s how to strike fear into your friends at your next water fight!

You may have joined me for building a hand-held Rocket Launcher and a Candy Cannon in previous projects, but did you know they can be multi-purpose devices? Not only do they launch rockets, and fire clouds of raining candy, they can also be used to fire water balloons .. and these things really fly!

I made a simple mod for the Rocket Rifle by attaching a 2′ length of 2″ PVC tubing, with some reducer fittings, so that it screws into the 1″ in-line sprinkler valve. It’s as easy as that!

Testing out some small water balloons from the dollar store, we lost sight of them after a couple hundred feet. That means these water balloons are blasting over 300 feet away! Your friends don’t stand a chance!

The balloon blasters are powered by compressed air, so to charge the system, you can either hook them up to an air compressor, or modify the valve to accept a bicycle pump.

A manual valve built into the systems allows the air chambers to be charged with air, then closed, trapping the air in the system, and making the balloon cannons completely portable! You may only get 1 or 2 shots off before having to re-charge however, so strategy will come into play!

With the Candy Cannon, I was able to load up 17 water balloons at once! And rather than just shooting them aimlessly, I targeted my neighbors house. Hopefully they realize that was just “friendly” fire.

In this video, you’ll learn how to “MacGyver” a 40 Watt Electrical Generator from a cordless drill and a few household items. Here’s how to charge your phone, illuminate small lights, and make electricity in a pinch.

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Endcard Links:

Music By:
Jason Shaw (RP-ThinkTank)
http://www.audionautix.com

Project Inspired By:

Kipkay’s video charging a phone with a crank flashlight http://youtu.be/Z_JI2Rvdzqs

WARNING:

This project is intended to be a “bare bones” approach to generating electricity in a tight situation. There are no voltage regulators, no diodes and no capacitors to smooth the current. There may a risk in charging lithium-ion batteries without a proper battery charging circuit recommended by the manufacturer. It worked fine for me, but if you try this on your phone, make sure you understand, and are comfortable, with the risks. Back up your data in case your phone is adversely affected and your data or equipment is damaged as a result. Use of this video content is at your own risk.By running an electric motor backwards, you can generate electricity.

Project History & More Info:

When using a cordless drill, remove the battery pack so you’re not fighting the back EMF, and press the trigger button in to allow the electrical connection to be made. Now all you have to do is twist the rotating end of the drill, and you’ll be generating electricity at the contact points where the battery would normally connect. On my drill, a cranking speed of 100 RPM yielded about 5 volts DC.

A few household items will make it practical to use. For example, a crank handle (made from a mixing beater and a salad fork) will give better leverage for cranking. Some aluminum foil that’s been rolled up into a wire will help direct the electricity to the point of use.

The faster and harder you can crank the drill, the higher voltage, and more amperage you can extract.

Ideally, this could be hooked up to a bike, water power, or a windmill to generate effortless energy, and if done carefully, the energy could be stored in a battery for later use.