This scene is from  Barnens ö.

Movie plot :

Reine is supposed to go to a summercamp called ‘Childrens island’ but decides to remain in Stockholm over the summer while his mother is working at a hotel. She thinks he is at the camp and he tells her he his. We then follow him around Stockholm that summer and see what he encounter on the path of life.

More info at http://www.imdb.com/title/tt0080419/