Water Electrolysis Machine

This interesting box, manufactured by Stan Rubinstein Associates, is a gas generator designed for welding. It takes in standard wall current, water, boric acid, and spits out two pipes of hydrogen and oxygen gas to weld with. Many possible applications. With a compressor, for example, the hydrogen gas could be stored in a high-pressure tank for use in a hydrogen car.

Digital Trainer

This is a rather unusual item. It is a logic trainer k-80, a piece of hardware designed to train people in digital electronics. It has a breadboard, various buttons to control the clock, and places to plug in wires to connect the various components and circuits within. Seems like a good way to learn basic digital electronics.