So many parts. It's more like a part per phase. My daughter just got accepted to her first university. I still remember her first time riding an amusement park ride. Her first sleep over. Her nervousness at joining her kindergarten class. When she kept biting her "friends" in preschool. It's something to capture at each step for me. Have a blast on the journey. It's really great.
My kid is not a hugger, so once in a blue moon, when I get a hug, I know it's real.
Also a few years back, I anticipated his request for something like breakfast in advance, and I got a heartfelt "you really understand me." That one line will keep me sane once teenage years hit.