The day a baby realizes the fun in peekaboo is an amazing day. An incredible feeling that takes place when your efforts are rewarded with more than a blank stare. Not even having three kids can diminish the delight.
It isn't just about easily winning a precious smile or chuckle, though that is certainly a nice perk. It's about witnessing one of the first recognizable signs of maturity. It's about being able to really start interacting with your baby.