How To Build A Catapult
This is a great little siege engine that really hurls projectiles! You just need some wood, a few screws, a rubber band and a couple of hours. This little catapult really hurls projectiles.
Brainstorm with others who love to make complicated things with Legos. For advanced Lego lovers.
Here’s a simple lie detector that can be built in a few minutes, but can be incredibly useful when you want to know if someone is really telling you the truth. It is not as sophisticated as the ones the professionals use, but it works. It works by measuring skin resistance, which goes down when you lie.
Making a Chinese compass
How to make a compass if you are lost and have no tools. And how to make a compass with some household stuff.
Free plans for building a hovercraft powered by a leaf-blower. Build in less than a day for $50, not counting the leaf blower. Return the leaf blower to its normal job later on.
Oatmeal Crystal Set Project
Complete plans for building a basic AM broadcast crystal set. These plans are excerpted from The Crystal Set Handbook, by Philip N. Anderson.
Here’s how to make a simple camera from an empty Pringles can.
Make toys at home with common household materials, often in only a few minutes, that demonstrate fascinating scientific principles.
Steam Engine Plans
The can will start turning slowly at first but in seconds it will be at hundreds of rpms. It will wobble a little even if you got every thing balanced but if not watch out!
Make your own windmills to decorate the top of a pencil or just for fun.
Science Supplies to purchase special parts for some projects.
Homemade Instruments to get plans for making your own music.
Plans for Making a Toy Car for Kids
Be an Inventor, Become an Engineer
Inventors of the Past
How do Buildings and Things in Buildings Work?