Bibi and Tina, The Cuddly Pony

Bibi and Tina can't believe their eyes. Somebody tied a pony to the Martin's Farm gate in the middle of the night. At first the animal is scared and shy, but when it's allowed to join the other horses, it turns out to be quite a cuddly little thing. Bibi asks Carla Caramba for help: Who would abandon such a lovely little horse?