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Plastic mechanical computer from 1963: The Digi-Comp 1 [video]
18 points by tobr
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6 comments
leephillips
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I had one! One of my favorite possessions in elementary school. It came with a nice booklet introducing the theory. Because I studied that booklet, I was probably the only brat in my 2nd grade who knew about number bases. I entertained myself by converting decimal numbers into binary.
drfuchs
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Wait til you see the DigiComp II! It has flip-flops driven by marbles and gravity. Truly astounding.