Im not sure where the game really began. There are some theories (here and here), like being a “dark joke in dark times” in Germany. Regardless of its origins, the game has caught popularity in our family and now spotting the unique design of “beetles” has become a pavlovian response to punching and a bit of fun. The increasing rarety of the original bochos means that spotting them is hard. Unless you come across a gathering of old VW vehicles.