Milestones, the second six months:
• Playing music causes your baby to clap, bob her head, and utter the syllables "Dugga dugga!"
• When you point to show your baby a distant object, he stares at your finger.
• Your baby progresses through all four of the "play saucer stages" at each sitting: (1) Bouncing happily up and down. (2) Swatting happily at saucer toys. (3) Bouncing and swatting with increasing speed, vigor, and intensity. 4) Frantic bouncing and shrieking, also known as a "meltdown."
• Your baby arches his or her back during one or more of the following: getting buckled into the car seat, getting a diaper changed, going into the highchair, catching sight of the crib.