Few people have heard of it, yet many consider John Blankenbaker's KENBAK-1 to be the first commercial personal computer.

Koss introduced these headphones over 40 years ago, and they remain affordable favorites to this day.

Build Your Own... Lightbulb?!

Diy-lightbulb

Bennett Harris writes, "Reinventing Edison: Build your own Light Bulb is a science kit that I created and manufacture. It is as retro as you can get in that it lets builders recreate the experiments of the great inventors and the design of the kit and instructions hearkens back to the great science kits of the 50's and 60's (like those of AC Gilbert and REMCO)."

I often fear the iPod generation is too far removed from basic scientific knowledge. Handheld gadgets might as well be magic, because few people actually know what's inside an mp3 player or game unit or how they work. Household science experiments like building a crystal radio, playing with radioactive isotopes or assembling a Heathkit computer have become quaint historical anachronisms. Thankfully, entrepreneurs like Ben Harris realize this and are trying to fill the knowledge gap with high-quality kits that teach simple concepts.

Build your own Light Bulb includes almost everything you need to create an incandescent light bulb, including a safety glass vacuum chamber, a pump, wire, 28-page color instruction manual and several different filament materials including carbon and tungsten. All you need to provide are a couple of 6V lantern batteries and an enthusiastic kid or two.

Ben's kits are available in the Maker Shed and there's a Harris Educational fan page on Facebook.

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