Rivalen Der Rennbahn is a German serial.

Las vacaciones de Bibi en la casa de su mejor amiga, Tina, tuvieron un emocionante comienzo. Casi al momento de su llegada, la granja Martin sufre de sequía, lluvia y una fuerte tormenta. Además, la empresaria emprendedora Kim Win Win quiere cavar en su granja en busca de grava. ¡Bibi y Tina tienen que hacer algo! ¿Acaso Chico, el misterioso español, podrá ayudarlas? Un verano turbulento espera.

Nonni and Manni is a children's television series produced as a joint venture between Iceland and West Germany. It debuted on 26 December 1988 on West Germany's ZDF channel and lasted for six episodes with the last one being aired on 1 January 1989.

The story was based on the eponymous book written by the popular Icelandic children's author Jón Sveinsson, nicknamed "Nonni", who had written several books inspired by his own experiences of growing up alongside his brother Ármann, nicknamed "Manni". The filming for the series took place in Iceland, West Germany and Norway.