Daddy is A Big Baby-A-Mulch

For some reason Alec started calling Keith, "A Big Baby-a-Mulch". We have no idea where it came from but it was pretty funny. The other day Keith referred to himself as A big baby a mulch and it came back to me. When we went to Hershey on vacation and we were in the pool, I held Alec and we bouced up and down in the water to a song we made up that Alec Loved, it was,
"Daddy, Daddy's A Big Baby-A-Mulch, A Big Baby-A-Mulch, A BIG BABY-A-MULCH!"
  Al loved singing this song and splashing up and down over and over again.
He cracked up so much.