Jon writes – “This is an electronics kit I had as a kid. Inside each interlocking translucent block is an electronic component, ranging from a resistor to a basic amplifier. This is seth came with 54 assorted blocks, test leads, battery case, meters, microphone and more. The manual contains 160 combinations for these blocks ranging from a simple circuit with a lamp to a transistor radio.” – Link.
Bloc-Tronic electronics toy