How To: Build hot air balloon out of a garbage bag

This is a simple and easy tutorial, and anybody can build a hot air balloon out of a garbage bag by following the instructions in it. All one needs is a garbage bag, some stiff industrial wire and fire starter bars. The important thing, according to the author, is to judge how many fire starter bars will be required to make the balloon rise without melting its plastic body. First, two long wires are twisted together in the middle to make an 'X'. A smaller wire is twisted onto the middle of th...

How To: Turn a 5MW laser into a 100MW laser

Tired of that dinky little 5MW laser? Turn the power up and convert your 5MW laser into a 100MW laser? A small amount of modification can produce a significantly stronger light coming out of your laser. You will need a small screwdriver (such as a jeweler's screwdriver), needle nose pliers, a soldering iron and some bonding glue to do this properly. This video tutorial will show you exactly how to turn your 5MW laser into a 100MW laser.

News: NASA's Curiosity Just Got Bricked! Working LEGO Mars Rover Ready for Exploration

Using a LEGO Mindstorms NXT kit, a pair of awesome engineers put together this fully functional replica of the Curiosity Mars rover. Not only is it built completely out of LEGOs, it's motorized, programmable, and ready to explore the far reaches of your living room. The rover was built for the Build the Future in Space event at NASA's Kennedy Space Center. Four of the six wheels are powered, allowing it to make 360 degree turns, and the arm and mast are both fully controllable. The entire con...

How To: Take apart a laser pointer

Have you ever had a combination of extreme boredom and an unrelenting curiosity? If so one thing you may have attempted to do is to take apart or "de-engineer" a common office laser pointer. In this online video we are shown how to take apart a cheap laser pointer. It should be noted if you are going to attempt to do this you should only try it on a laser pointer that is inexpensive so your loss will not be great if you should make an error.

How To: Build your own Japanese katana out of foam

If you're looking to play a samurai or other Japanese inspired character at your next boffer larp, this tutorial is for you. You're shown how to build a foam katana using duct tape, a razor blade, measuring tape, cloth athletic tape, DAP contact cement, liquid craft latex, fabric to cover your blade, rope, fiberglass core, and of course, foam!

How To: Build spinning tops with everyday objects

In this tutorial, we learn how to build spinning tops with everyday objects. You will need: round recyclable plastic lids, skewers, hot glue gun, and washers or pennies. First, take your plastic lid and weight it with a penny, then poke a skewer through the middle of it. After this, you will have a top made out of homemade products! You can use anything that is laying around your home to make a top, no matter what it is. Just make sure you have something to place int he middle and the weight ...

How To: Make a mini K'Nex pistol

This video tutorial is in the Hobbies & Toys which will show you how to make a mini K'Nex pistol. Chris Swartzentruber shows you how to do this in this video. First make the trigger mechanism with the green, white, blue and orange parts as shown. Next make the handle using the parts as shown in the video. One end of the handle is green and the other end is orange. Then you make the handle support, barrel, magazine, rod pusher and the firing pin as demonstrated. Attach the handle to the barrel...

How To: Make your own mylar balloon

Mylar balloons are the best party favors. They are big and shiny and last longer than normal latex balloons. In this tutorial, learn how to make a mylar balloon at home, from scratch. Stop spending so much money at the party store, and next time you have a big event, make your own! Not only will you save money, but it will give your party a cool personal touch.

How To: Build a LEGO sink

Building a LEGO sink is not difficult at all. You will need only 6 simple parts: 2 1x2 thins, 1 2x2 thin, one sink element (this is kind of rare so if you're not able to find it, you may have some trouble making the sink), and 2 1x1 right-angle elevated bricks. Starting with the 2x4 thin, stack the 2x1s on top of each other and place them on the end of the 2x4. Now take the elevated bricks and snap them on the other end. Finally, attach the sink element so it is facing the elevated bricks. Th...

How To: Make a Lego minigun

This is a Hobbies and Toys video tutorial where you will learn how to make a LEGO mini gun. For making this toy, you will need the LEGO mini gun kit. The mini gun consists of eight parts. Probably the pieces do not have names. So, the kid who is demonstrating in this video keeps referring all the parts as pieces. You first take the long grey piece and put a small light grey piece on top and push all the way down. Then you take another similar piece and fix it at the top and leave it aside. Th...

How To: Make a Lego balisong butterfly knife

Balisong knives, or butterfly knives, are folding pocket knifes with two handles that can counter rotate. People love performing tricks with them because of the balisong butterfly knife's flipping ability. Since knives aren't toys, make your balisong butterfly knife out of Legos. You still might hurt yourself, but not as badly as with the real thing. Learn how to build a Lego balisong butterfly knife by watching this video tutorial.

News: How to Make Tinfoil Cars

In this video, I show you how to build tinfoil cars for crushing with toy Monster Trucks. My son Eston and I love monster trucks. One of the most exciting things when you go to see monster trucks live, is when they crush cars. Problem is, when you use your hot wheels or matchbox cars with your monster trucks, they don’t get smashed. So the realism isn’t there.

How To: NASA Engineer Shows You How to Build a Mini Curiosity Mars Rover Out of LEGOs

You might have seen our post on this last week: It's a working reproduction of the Mars Curiosity Rover made with LEGOs, but it's a bit complicated for anyone without a decent amount of robotics knowledge. Plus, you need to have some Mindstorms NXT and TECHNIC parts lying around. If you want something a little simpler than programming a working LEGO rover, you could always build a scaled model of the MSL out of regular LEGOs. Not only is this easy to build and looks great, but the step-by-ste...

News: This LEGO Mindstorms Submersible Can Be Piloted by Your Xbox Controller

Making little robots with a LEGO Mindstorms NXT set is already cool, but putting one underwater? Now that's just crazy. That didn't stop this engineer, who built a LEGO submarine that can not only maneuver around his fish tank, but can also be remotely controlled with his Xbox controller. The craft has a sealed battery compartment, exposed Power Functions motors, and features real-time communication between it and a laptop using a NXTbee wireless module.

News: Full-Sized Mechanical Skeeball Machine Built Entirely Out of K'Nex—And It Works!

If you played with K'Nex as a kid (or still do), you know that it can take a lot of those tiny little pieces to build something. Just imagine how many it must have taken to make this full-sized, fully functional, coin-operated skeeball machine with a mechanical score counter. Instructables user Shadowman39 (aka Kyle) spent an entire year building this masterpiece. It's the same size as the ones you see in arcades, and it's coin operated, too. But don't try to feed it your pennies, it knows th...

How To: Make a catapult out of office supplies

Looking for something fun to do with all those office supplies you've been stealing from work? Or maybe you just want to goof around in your cubicle? It's possible that you are an honest, dedicated, hard worker, but whatever the case may be- no judgement, just a video guide to making an office supply catapult.

News: Flying Pegasus Operated with LEGO Gears & Cranks

Korean MOC Pages user Kyoung-bae Na, aka edulyoung, constructed this beautiful LEGO automaton of a winged Pegasus. Maneuvered with a series of mechanical LEGO gears and cranks, watch below as Pegasus "hovers", flapping her wings. Kyoung-bae Na sells his creations out of his e-shop, Studio Amida. The Pegasus automaton was previously going for $140, but is no longer listed; however, there is a clownfish currently available for the lower price of $33.50. The models are so fantastic—it makes one ...

News: 4 Years of Spectacularly Pointless Marble Machines

So very pointless, yet unquestionably spectacular. The best kind of "art" performs no other function than to delight the viewer, and Japanese YouTube user Denha's complex marble machines do just that. But are marble machines art? You can call them that—or toys, scientific contraptions, engineering feats—but however you choose to label them, the best marble machines are complicated, skillfully crafted, and driven by the principles of potential energy, kinetic energy and gravity.

How To: Make a homemade stirling engine

Are you looking to build a cool home science experiement? Why not try out a Stirling engine? Wait, what IS a stirling engine? Well... a Stirling engine is a heat engine operating by cyclic compression and expansion of air or other gas, the working fluid, at different temperature levels such that there is a net conversion of heat energy to mechanical work. This project was made from parts around the house and you should be able to do the same. This is a great project to explain how gears work,...

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