There are three movies in the IMDB with this title; two are short films with very little information available. One is a 1999 American 17-minute comedy film written and directed by Greg Zekowski with a cast of Michael Cudlitz as Gary, who is robbed by Rick Peters' character, also called Gary. The other is a 1997 Israeli 10-minute film; its Hebrew title is transliterated as "Mashe'hoo ba'al erech." It was written by Dorit Hakim and includes Salit Ahi-Miriam, Daniel Moskowitz, and Uri Ran-Klausner in the cast.

But the one I've actually seen is a classic French movie (the original title is "L'Argent de Poche") from 1976 about some children. This film was directed by François Truffaut and co-written by him with Suzanne Schiffman; it takes place during summer in a smallish town in the middle of France, and follows various children in a series of semi-connected scenes. Truffaut is supposed to have spent a lot of time watching his child actors (all new to movies at the time) and creating a script around the way they behaved, rather than starting from a purely grown-up perspective. One boy, Julien, is abused by his family; another, Patrick, discovers his interest in the female sex; there are also lovelorn schoolteachers and other adults. Despite being fiction, there is a strong documentary feel to the film, as if it were just picking examples of all the things that happen in real life. But it is not a dark film; the children bounce back from their sorrows and create really funny moments. Some reviews have called it an overly sentimental look at childhood and the beginning of adolescence, but the majority consider it charming.

Sources:
www.imdb.com
http://members.netscapeonline.co.uk/jameswtravers/nf_L_Argent_de_poche_rev.html
http://www.geocities.com/schorchsi/0015/001501.htm
http://college4.nytimes.com/guests/articles/2002/01/11/895993.xml
http://www.epinions.com/mvie_mu-1019219