Overview: Top of the Sky: Sally, Nick and Cat are playing with their toy rocket. Using the Cat's "Whoa-Look-At-It-Go-Launcher" he shoots the rocket up up and up! But now they need to go find it. Off to the top of the sky! They pass the treetops, and the mountains. Where is the top of the sky? They keep going higher until they're in space! They meet Audrey the Astronaut who explains that there is no top to the sky. The sky turns into space and space goes on forever! Just when the kids think their rocket is lost, they find it in Audrey's space station. Though they can't launch ...