Wanna See My Beautiful Navel? (1978)

Coming of age, summer camp and first love... Shy 15-year-old Claus is in 8th grade and is going on a school camp in Sweden. His classmate Lene, who is braver and more outgoing than Claus, is also going on the trip. During the trip, Claus gets the opportunity to get to know Lene better and gets his first taste of what adult life has to offer.