Yes, Tyler has known how to play peek-a-boo for months now. But that was with us doing all the work. Just this week peek-a-boo has turned into the game we play while changing his diaper.
"Where's Tyler?" That's his cue to cover his face. He will sit with his face covered and giggle until you say "Peek-a-boo!" or "there he is!" Then he throws open his hands and laughs even harder.