It was the 1960′s, and people were building some very interesting digital computers. One of them was the Digi-Comp II, which we have written about extensively: a binary mechanical computer based on rolling marbles and flip-flop gates.
For an entirely different approach, look no further than How to Build a Working Digital Computer (1967) by Edward Alcosser, James P. Phillips, and Allen M. Wolk. You can download it as a free e-book (PDF, EPUB, Kindle) at Archive.org, thanks to the BitSavers PDF Document archive.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.