What happens when children don't mind their parents? Zorb wants to use the Earth as a ball for his game of Planet Pong. His mother tells him to leave Earth alone. When Zorb refuses to listen, his father decides to teach him a lesson about humans. In Grounded to Earth, students have the opportunity to retell and analyze a character while reading an interesting science fiction tale.What happens when children don't mind their parents? Zorb wants to use the Earth as a ball for his game of Planet Pong. His mother tells him to leave Earth alone. When Zorb refuses to listen, his father decides to teach him a lesson about humans. In Grounded to Earth, students have the opportunity to retell and analyze a character while reading an interesting science fiction tale.