Rough technicians were educated in the USSR:

In the journal "Young Technician" No. 7 for 1982 were published drawings for the independent manufacture of rubik cube. They differed from the design known to us and were specifically designed for wood components. However, the one who would like to collect such a cubic, would have to: stock up 27 identical cubicles of (necessarily) buck or lip, bronze rings, wax for lubricating branches. The instructions ended with the words, “If the first time failed, try again.”