Reproductions are still produced, see the wikipedia page.

I bought one of these from Edmund Scientific when I was a kid. I wasn't able to figure out how it worked. I've thought about it occasionally over the years. Enjoyed the video

Wow. didn't know mechanical computers could be so simple.

It's cool to see Chris Staecker's channel getting some love, he brings a a kind of joy I miss from the old internet. I know it's still around, but it certainly feels more difficult to find and suppressed in many ways.

I still have my Digi-Comp I, as well as Dr. Nim and Think-a-Dot.

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

I had a CARDIAC when I was young.

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.

3D print your own: https://www.thingiverse.com/thing:1477209

This reminds me, a CNC wire bender is on my list.

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