Yes, "Planet 51" is considered a kids' movie. Released in 2009, it is an animated science fiction film aimed primarily at children and families. The story follows an astronaut named Chuck Baker who lands on an alien planet inhabited by green creatures living in a 1950s-style society. The film features themes of friendship, acceptance, and adventure, making it suitable for younger audiences. Its colorful animation and humor appeal to kids, while the underlying messages also resonate with parents.

As of now, there is no official sequel to "Planet 51." The animated film, released in 2009, follows an alien named Lem and a human astronaut, Chuck, who crash-lands on the planet. While the movie was well-received and had a unique premise, it has not spawned any direct sequels or follow-up films. There have been discussions about potential projects, but nothing has been confirmed or developed into a sequel as of October 2023.

In "Planet 51," the main antagonist is General Grawl, a military leader who believes that the arrival of the human astronaut Chuck Baker poses a threat to his planet. Grawl is determined to capture Chuck and protect Planet 51 from what he perceives as an invasion. His actions drive much of the conflict in the film, as Chuck, along with his alien friends, tries to evade capture and find a way back to his spaceship. The film combines elements of comedy and adventure with themes of misunderstanding and acceptance.

As of my last update in October 2023, "Planet 51" is available for streaming on platforms like Amazon Prime Video and Google Play Movies. It may also be available for rent or purchase on other digital platforms such as iTunes and Vudu. Availability can vary by region, so it's best to check your local streaming services for the most current options.