Comment by krige
2 days ago
These very distinctly remind me of electric/electronic didactic "toys" from the at least 80s. Plastic cubes, containing a single (usually) circuit component, like switches, resistors, lights, coils, or just wire, with bare metal connectors on relevant sides and a symbol on top. You got a whole bag of them, as well as a gridded board you inserted the cubes into. Could make even usable stuff like simple radios.
Denshi blocks:
https://en.wikipedia.org/wiki/Denshi_block
Still got mine, which has a synthesizer module that can be used for interesting experiments.
In Japan the company made professional versions for students - they were a bit bigger and more robust, but the same basic concept.
Not the one I had in mind, but very similar and definitely much cooler looking. The kits like these are still made and sold in various countries.
One of my kiddos loved SnapCircuits. Similar, but more kid friendly.
https://elenco.com/snapcircuits/
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