Peeping Penguins

[first lines]

Mother Penguin:
[singing] Curiosity killed the cat. / Curiosity did just that. / The little cats had nine lives it's true, / But only one life was given to you. / So it isn't so wise to snoop, / Or you'll finish up in the soup. / You better just stop right where you're at. / Wopple-up-gup, remember that! / Curiosity killed the cat!

[last lines]

Boy Penguins:
Cross our hearts, we promise never, never to be curious again.