I don't know why you expect to be different from all the other parents, we all desparately make up words.I use ... if that Billy Goat runs away, daddy's going to get you a horse and sleigh.
If that horse and sleigh turns over daddy's going to get you a dog named Rover.
If that dog named Rover won't bark, daddy will get you a meadowlark.
then I start getting desparate.
There was a parody done by the Brothers In Law in the sixties called 'Lullaby to a Spoined Brat' does anyone have the lyrics to that?