150 in 1 Electronic Project Kit
These kits, do you remember them? Can you hear the sound of the wires as they shuffled on the cardboard surface, the creak of the springs as you inserted the wires, the crackle in the earpiece from slightly loose connections?
One of my favorite toys from the 70's. Shown here wired up as "The Big Ear" project: A high gain amplifier, using the speaker as a microphone.