As Kiddo reached each milestone (holding head up, rolling, etc.) we would cheer her on with comments of "you're such a big girl." As we started using those phrases with Baby, Kiddo called foul. After all, the way we convince her to use the potty, sleep in her bed, and everything else is by reminding her she's a big girl. Obviously the baby can't also be a big girl. So Baby is "a strong girl" as she reaches her milestones. After about a year this won't work so well, because the milestones are less physical, but I wonder about the different expectations and impressions this will put on the two different girls.