In 1979, after three years of development, QUADRO was introduced for the first time at the International Toy Fair by its inventor, Doris Rüther, together with her husband.
The first prototypes were built back in 1977/78 and tested in 16 German kindergartens, always in close cooperation with TÜV, the German inspection agency. The results were quite positive and led to the certification of the entire QUADRO system, even though this was completely new territory for TÜV.
In mid-1979, QUADRO became an independent family business. A new direction was set: QUADRO would no longer be a product for one market, but rather a system for many markets across the entire leisure sector — for children and adults, in homes and in yards, indoors and outdoors.