The progression of a timeless game

Ezekiel and I were just playing a little game of peek-a-boo that consisted of me hiding under a t-shirt and then jumping out and yelling "Peek-A-Boo"! I took the shirt off my head and threw it on top of Ezekiel’s head so his face was hidden. He pulled the shirt off his face and said (in his little scratchy-husky-boy voice) a perfect "heek-a-poo"! I love it. So it is no longer peek-a-boo, it has made the progression to heek-a-poo.