Bengbulan

The twelve-year old Carmen has to stay at home during the summer while most other people are on holiday. She plays with the the younger children Anders and Kerstin. The much older boy or young man Bengt-Olof is a little bit retarded and has no other friends of his own age. Therefore he frightens and mobs the younger children in the neighbourhood who first try to flee him. But after some days they plan their revenge... - IMDb