I like this movie, it's childlike but utterly charming. Astrid Lidgren surely knew how to captivate children with her books. As so many of these books were adapted into movies, then swedes have a rich and complete history on movies especially for children. That's not to say that they aren't appropriate for older audiences - they are, depending on the public.
This is a light comedy type of movie, pure, magic, with nothing to insult anyone and no bad stuff, just innocent and captivating.
When children, most of us certainly had our imaginary friends. Well, cute little "Lillebror" has just found the kind of friend that could only exist in children's fantasies, except that he isn't fruit of a child's imagination, he is real! That new friend is Karlsson, an eccentric and peculiar boy with a propeller on the back which gives him the power to fly. Now "Lillebror" has found the friend many children aspire to. More than that, "Lillebror" can also fly by sitting on Karlsson's back and see unique vistas of Stockholm.
The scenario is very nice and complete, in good old Scandinavian tradition....
Mats Wikström is perfectly convincing as Karlsson. Our beloved "Skorpan" (or "Lillebror", in this case), Lars Söderdahl, couldn't be better, he always proved to be a fine Swedish child-actor.
This should definitely be on Top 250.