Cow and Chicken - Season 3 - Eps 29: Intelligent Life?
Cow doesn't wish to come in, but rather stay out all night to stare at the moon. So she builds a make-shift rocket ship out of cardboard boxes, a trashcan, and traffic cone. It ACTUALLY works, and finds herself on the planet Mud, where she brings space alien (Red Guy) back to earth where he says the solution to all problems is: puppets.
About Cow and Chicken

Title: Cow and Chicken
First Air Date: 1997-09-16
Last Air Date: 1999-08-13
Status: Ended
Rating: 7.09/10 (from 469 votes)
Language: EN
Seasons: 5
Total Episodes: 156
Network: Cartoon Network
Genres: Animation, Comedy, Kids
Production Companies: Hanna-Barbera Productions, Cartoon Network Studios, David Feiss Productions
Synopsis
Follows the surreal adventures of a cow, named Cow, and her chicken brother, named Chicken. They are often antagonized by "The Red Guy", who poses as various characters to scam them.
Cast

Charlie Adler
Cow / Chicken / The Red Guy / I.R. Baboon (voice)

Candi Milo
Mom (voice)

Dee Bradley Baker
Dad (voice)

Michael Dorn
I.M. Weasel (voice)