Die Schildkröte hat Geburtstag

In the organizer's words:

She woke up early, thought a little about what today might be, and then she immediately remembered: It's her birthday! It's the turtle's birthday! Her biggest wish: a head of lettuce! Big! And green! And juicy! I wonder if anyone will think of that? A cheerful story about friendship - for everyone who has celebrated a birthday at least four times in their life.