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When I was a kid, playing with a box of old toys belonging to my dad, I did found just a couple of Mobaco pieces. I never knew what to do with this, until finding the nice Mobaco retro construction game from luisman a couple of months back. There is even a very informative [website](https://mol8.home.xs4all.nl/MOBACO_Seamonkey/Home.html) about this construction toy and I especially like the simplicity of the [instructions](https://mol8.home.xs4all.nl/MOBACO_Seamonkey/Building.html) coming along.