Nils are feeding Lena, but she spits out the food and hits him in the face.
Mehmet comes by and Nils tells him that Lena just keeps crying and won't eat. Wolle overhears it and concludes that it must be a job for the great detective Wolle. Detective Wolle starts by asking Nils and Mehemt whats wrong and are told that thats just it they don't know. Wolle thinks it's a interesting case , but how do you investigate something you don't know what is. Wolle first conclusion are that Lena needs her diaper changed, but Nils says that he already did and that Wolle can smell it for himself, at first Wolle don't want to but ends up taking a sniff and concludes that Nils are right. Wolle then suggest that it could be because she's hungry. Once again Nils tells Wolle he's wrong, Nils has made her favorite food and she spits it out. Wolle then concludes that it's because she wants to eat something else, but what ?
Nils and Mehmet starts to gather all kinds of food from the store and around Nils house. Afterwards Wolle tells them that they then should present Lena for the various food, so she can tell them what she would like to eat. Nils thinks it sounds like a good idea and carries Lena over to the food to show it to her, but Lena don't have much interest in it at all. Wolle concludes that Lena are not hungry so there must be something else wrong.
He re-thinks and comes up with a new conclusion. The room are not kid friendly, it's way to dull. Nils and Mehmet starts to redecorate the room. Wolle tells Lena to take a closer look at the room, and afterwards she starts to cry again. Wolle then realizes that it's correct that the room are decorated but the three of them also looks dull so they need to change their clothes. Mehmet, Nils and Wolle pops up next to Lena wearing party hats and starts to cheer and laugh. Lena starts to laugh but shortly after she resumes the crying. Nils and Mehmet gives up, but Wolle has a new idea. He are sure that Lena don't want to be inside she wants out in the fresh air.
They take turns pushing Lena around on Sesamstrasse until all three of them are tired and they return to the house. Wolle thinks that this are his toughest case ever and that he must think in quiet for a while. No sound can be heard and Mehmet looks around and whispers to Wolle who tells him to be quiet since he thinks. Mehmet says to Wolle thats just it, everything are quiet Lena are not crying. As Nils puts his hand over to Lena she bites him, and he realizes that she has gotten her first tooth. They realizes that that was what was wrong. Wolle declares the case for closed. Nils then tells Wolle that he has a new case for him, Wolle gets excited he loves new cases. Nils says that he, Mehmet and Lena are gonna go to the play ground and in the meantime Wolle will clean up the house.
Bert are about to eat his cookie, when Ernie stops him. Ernie tells Bert that eating to many cookies will give him a toothache and that he would not want that. But before Bert can finish saying that of course he won't like getting a toothache, Ernie snathes the cookie and eats it. Ernie then says that he has noe ensured that Bert won't get a toothache now.
Kids talks about milk teeth.
What sound does various food makes when you eat it.