It's CIRCUS FUN right in your BOWL and you're gonna wanna come FLYIN'! With HORSES AND PIGS AND COWS AND BEARS and even the occasional LION!
I dunno if those lyrics are right, since I haven't heard the song in about (literally) 17 years. I knew the cereal made people throw up, though. Come to think of it, cows and pigs aren't very circusey.