I was given a kit when I was about 10 (60's). It consisted of a piece of hardware pegboard, a bunch of thin card templates marked-up with circuit symbols, and s

I was given a kit when I was about 10 (60's). It consisted of a piece of hardware pegboard, a bunch of thin card templates marked-up with circuit symbols, and springs and components (anda manual). You chose the right card for your project, pressed the springs through the card into the pegboard, and then clipped the components into the springs. You could make things like a radio receiver, a monophonic keyboard, a baby monitor. With my radio receiver I first discovered Radio Luxembourg, which my father disapproved of; I listened to it under the bedcover. I also discovered Captain Beefheart and Jethro Tull on the John Peel show.