Workhorses
Use a simple mortise-and-tenon joint to make these fine looking shop horses that you will use every day and will last a lifetime.
Hammer
Harvesting Chemicals from a Battery
This tutorial shows how to take apart a spent zinc-carbon dry cell of the common household type. Besides making for an interesting object lesson in electrochemistry, taking apart a spent D-cell, for instance, allows you to salvage many materials which can be of use to amateur chemists–materials which would otherwise probably end up in a […]
Instant Ice Cream with a Dry Ice Bath
Making ice cream with cryogens stronger than water ice is a fairly common chemistry demonstration stunt. The ideal way to do it is with liquid nitrogen, which is poured directly into the ice cream mixture, with stirring, and causes it to set up in about 10 minutes. Liquid nitrogen, however, can be rather difficult to […]
Solar Tracking Platform
Use a solar-powered motor and a shade to follow the sun, maximizing its energy.
Off-Grid Laundry Machine
This think-small washer needs no electricity or running water.
Hollow-Core Door Table
Replace a battered tabletop with an inexpensive door.
Playable Pac-Man Costume
Eat ghosts and power pellets with this wearable Pac-Man getup that really works.
