Boku tachi to chûzai san no 700 nichi sensô

This is a sweet and incredibly funny movie, and unlike a lot of what Hollywood puts out, it's something you can watch with kids without worrying about the content (unless you just don't want to encourage pranks, I guess). It reminds me of the Iranian film Children of Heaven in that way--it moves its plot along without the help of sex or violence or profanity, and depicts a very goodhearted, kind perspective which happens to be a perspective from the young. But just as importantly, it's original: from the opening scene, nothing that happens is what you have been trained to expect from cinema--and that's a good thing.