Help me please  find a movie⁠⁠ I’m looking for an old one – it seems to me from the 50s-60s, perhaps an American, perhaps even a black and white film, about a children’s military camp or school, at the end of the film, something like military games between schools are held where each child has a balloon with paint and they have to color each other.

  Sry for use google translase, my english not so good