Wee Sing in the Big Rock Candy Mountain(1991)
"What would it be like to slide into a world of ice cream mountains and lemonade streams?"
Lisa and her imaginary friends the Snoodle Doodles slide down her swing set and into the Big Rock Candy Mountains when they say "1,2,3 peppermint trees." When they get there they meet Profster (a huge bird), the Mee-ce Mice, Little Bunny Foo Foo, and Felicity (a unicorn). The good fairy turns Little Bunny Foo Foo into a Goon because he "bops the mee-ce mice" on the head after the 3 chances the fairy gave him. It's a musical and has tons of songs. Good Times.