Knuspel is a squirrel who lives in a tree at a park in Hamburg, becoming good friends with Pferd, Wolle and Günni, who all live in a nearby giant carrot house. Having appeared in episodes of Eine Möhre für Zwei before (namely Ein eigenes Lied and Geräusche in der Nacht), she received a starring role in the Sesamstrasse spin-off's 2013 TV movie Das Geheimnis der Blumenfabrik, when she faces the loss of her home, making way for a plastic flower factory.