Five Perky Penguins

Five perky penguins stood on the shore
One went for a swim and then there were four.
Four perky penguins looked out to sea
One went swimming and then there were three.
Three perky penguins said,"What can we do?"
One jumped in the water and then there were two.
Two perky penguins sat in the sun.
One swam off and then there was one.
One perky penguin said, "This is no fun!"
He dived in to the water and then there were none.