Ethan happened to have a bib on during a diaper change, so to keep him entertained, I flipped it up over his face and asked, “Where’s Ethan? Where is he? Where is he? Where is he? …” Then I pulled the bib down and answered, “There he is!” He giggled with excitement, as he has countless times when we’ve played the game. But this time, he took hold of the bib and hid his face from me all by himself. I filled in the vocal part; he did the peek-a-booing, half a dozen times or so. He was giggling away, while I was trying not to look to stunned from witnessing another wondrous surprise.