Struwwelpeter headcanons (based on the movie)
The children didn’t truly know each other until the end of the movie.
Right before the scene we see at the end of the movie, their parents took them to Nikolas’s house. The scene is set during the Christmas season, which in Germany would consist of the four weeks of Advent until the 24th (correct me if I’m wrong).
We see the unnamed woman and her son from the beginning of the book walking onto the scene first because they want to be role models to the others.
The Inky Boys were honestly being cut a little slack, in my opinion, as after the events of the film they were banished from the group.
Colin (the unnamed dark-skinned boy) wanted to join the group, but he’s very shy. He still shows up from time to time, though.
Robert actually picked up his umbrella after the events of the film and kept it, even though he no longer uses it in really heavy storms- his parents are fine with little drizzles.
Philip still owns his stick horse and loves it.
The hare hopped off into the woods with his new cabbage. He is a wild animal, after all.
Konrad’s thumbs came back -you guessed it -because of Nikolas. Nikolas decided to give him a second chance- if he ever sucks his thumbs again, they’ll be gone for good. Gladly, Kon has vowed to not suck his thumbs evermore!
Paulinchen wasn’t playing around when she backed up from that sparkler! Fire gives her the creeps now.
Minz and Maunz still have their catnip mousies.
Hans no longer looks at the sky while he’s walking, but he does when he’s lying on his back and relaxing, on, say, a towel or a lounge chair. And yes, he loves that piano a lot.
Seeing Kaspar walk up to Nikolas while finishing a bowl of soup just tells all: he loves soup, he always has, and he always will. But I’m sure he enjoyed those candies Nikolas gave him very much, too.
The sausages Nikolas gave Tray were, of course, liverwursts.
Friederich was very worried about his punishment, and that’s why he came next to last. He also believes he and the Christkind are on very rocky terms, so he didn’t know what she was going to think of him becoming a good person. He didn’t even think she was going to believe it.
Peter took a long time to get himself all nice and neat. That’s why he came last.
After the events of the movie, Nikolas let the children free to do whatever they wanted. So they introduced themselves to each other. They then met up many times after that event and eventually became close-knit friends. So I guess you have Nikolas to thank for their friendship.