This gem, made in Czechoslovakia, was played in late 70s, 80s and 90s, mostly in communist and ex-communist countries. The cartoons were so good, that new series were made until recently and are still played on local TVs.
The premise is simple. Two friends with tendency to corrupt working devices and accidentally damage their fine built living habitat, use their creative thinking and lots of improvisation to repair the damage or regain functionality of broken objects. The series usually ends while testing their new achievement and making the distinctive handshake.
Let me just introduce one part I find particularly funny: while repairing the parquet floor, the two characters find the self propelling polishing machine fun to ride on, and each using their own, start chasing each other. After they find that using usual electrical socket makes them entangled in cables, they simply remove the light in the room and use its wiring to power the polish-machines :) After they get enough of chasing, the parquet-floor is unfortunately already used all the way down to concrete.
The show doesn't contain talking and the plots are simple enough for even the smallest kids to understand. Next to that, the plots something I dub "bringing up the technical spirit" :) But what really stands out is the ingenuity behind the plots that usually makes the viewer almost fall out of chair.
A feature that also needs to be noted is harmonica-played soundtrack that is know pretty much all over eastern Europe.
The series are known and viewed by young and old. And are a lovely part of my childhood. This show really does raise the bar to example of how it should be done. Makers of the show, I humbly salute you!