Bibi And Tina Are The Main Characters Of The Same Named German Audio Book For Little Children. It's A Side Series Of Bibi Blocksberg Playing On A Farm. Tina And The Martinshof Appeared In The Bibi Blocksberg Episode Der Reiterhof Teil 1 And Der Reiterhof Teil 2 The First Time. Later In 1991 The Audio Book Series Bibi Und Tina Started. There Are Currently 57 Episodes.