Reproductions are still produced, see the wikipedia page.

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.

I had a CARDIAC when I was young.

Still got it? Would be pretty neat to bust out of the attic ..

Really cool! Will we ever construct Babbage's Analytical Engine?

Wait til you see the DigiComp II! It has flip-flops driven by marbles and gravity. Truly astounding.