Karlsson's grandmother is the world's best racing driver and Karlsson is not so bad either. Kaxige Kirre challenges Karlsson in a box car race. Now it is up to Karlsson and Lillebror to build a really fast car so that they can give Kirre what he can stand. Little brother has made a kite at school that he wants to test fly with Bosse. Just this day, it blows a lot so the dragon wears itself out and sticks out into the sky.

Karlsson on the Roof is a heartwarming comedy-family-fantasy movie based on the beloved children's book. The story follows a young boy named Karlsson who befriends a man with the ability to fly. Together, they embark on exciting adventures, including visits to an amusement park and rooftop escapades in Stockholm, Sweden. Karlsson's sister, their dog, and other neighborhood children join in on the fun. The movie explores themes of friendship, family relationships, and the power of imagination.