Planet 51 (2009)

An astronaut lands on a seemingly uninhabited planet, only to discover it's teeming with green-skinned natives living in '50s-style suburbia. Mistaken for an invader, he teams up with a local teenager to escape capture and find his spaceship. Along the way, they both learn about friendship and understanding different cultures. The tables turn amusingly in this tale of unexpected exploration, where the story's lessons on tolerance and curiosity are perfect for a young audience.