I Wish by William Marsland.

[billy]

My little sister liked swimming with the fishes,
though we have none down the well.
She loved to really sing out loud,
I heard it in her yell.

My little sister always had her puppy by her side,
she never let me play with it, told mommy that I lied.
Now they both swim with the non-existent fishes
and I have my own little puppy.