The trick to crafting a good children's movie is to create a film that captures the imagination of young viewers while simultaneously transporting parents back to that time in their lives when anything seemed possible. When filmmakers strike that perfect balance, it's like they're bridging the gap between childhood and adulthood by eliminating the skepticism and cynicism of grown-ups, and gently teaching young ones a little bit about how the world really works. It's obvious that the filmmakers behind Planet 51 worked diligently to create a film that speaks to audiences of all ages, but while the concept of a human space explorer landing on an extraterrestrial world resembling our own 1950s society is ripe with possibilities, their choice to go the conventional route results in a film that's technically accomplished, yet aggressively generic.