The Q shows us how to use plastic soda bottles, tire valves, tubing, and a few other bits to build a homebrew compressed air weapon which can fire a seemingly endless stream of pellets. We’re thinking you could ramp this thing up to include as many soda bottles as you can carry.
Bare Conductive’s Electric Paint Kit comes with an LED light, conductive paint and paper templates. It lets you make a touch-sensitive lamp, a motion-sensitive lamp and a dimmable lamp, no tools or computer needed. You can also use the LEDs in more complex projects.
Natural Nerd shows how to build a countertop machine which can dispense multiple beverages. It uses aquarium pumps to move liquids into your cup. It’s best for tea, juice, and other non-carbonated drinks. Full materials list and build details available on Instructables.
Builder Ivan Miranda shows off a unique remote-controlled vehicle he 3D printed that steers entirely by adjusting the direction of its thrust. The field test video demonstrates it’s lack of controllability, but we’re betting it would be fun on a frozen lake or skating rink.
Grid Beams look and work a lot like Meccano girders, except they’re large and sturdy enough to make furniture, structures and other usable objects. They come in either recycled Douglas fir (with 5/16″ holes) or aluminum (with 7/16″ holes). Learn more in the Grid Beam book.
Blackfish shows us how to create a really cool toy weapon which fires rolled up paper projectiles. Its rubber band powered revolver mechanism lets it fire up to eight darts without reloading. We assume you could expand on the idea and make one that fires more ammo.
We’ve seen hot tub boats, but a hot tub car? Only Colin Furze would be brave enough to take this on. As if the plan wasn’t crazy enough, he chose to sacrifice a BMW E30 convertible. Watch him try his best to seal and reinforce the car for its new occupant – a ton of hot water.
Today’s cotton candy is made by heating and spinning sugar using a motor. Eater host Clifford Endo is here to show you how to make it the old fashioned way, using a technique similar to noodles, hand-pulling inverted sugar to make thousands of hair-thin sugar strands.
Toy replicas of Dragon Ball Z‘s iconic Saiyan Scouter are a dime a dozen, but most of them use a headband to stay on your head. Foam lover Odin Abbott used craft materials to make a Scouter that hangs on his ear. The key is to add a piece that’s similar to earphone grips.
Slivki Show demonstrates how you can use a couple of cheap computer fans, a plastic tray, and some water to turn a brick into a desktop air conditioner. The porous nature of the brick, and the cutouts in the one used here, turn it into a surprisingly efficient cooling device.
Most beer koozies are made from foam or fabric. But Ollari’s shows us how to make a super slick koozie from carefully segmented blocks of walnut, maple, and padouk, glued together, then turned on a lathe. A layer of clear lacquer protects it from condensation.
YouTube channel HouseholdHacker dusted off an old 1957 Science and Mechanics book filled with tips and tricks for around the house and decided to put some to the test to see if they were still relevant and useful today. We’re so trading in our oven mitts for a metal dustpan.