Children grow, you know?  I mean, I have four, and it's just incredible how fast they've gone from infant to college (my eldest, anyway).  I look back on the pictures I've taken of them over the years, snapshots and pro work, and I'm so grateful I took the time to do it.  Because in the end, that's what we have--memories.  Photographs are memories frozen to archival paper, and when you look at them, they take you back.  It's important.