Have I forgotten so soon?

I watched a friend's little girl today, while she took her older daughter on a field trip.  Now this little girl is exactly on year younger than Bella and still in diapers.  She and Bella were playing well and I was in the middle of baking a snack for small group tonight and cleaning up the kitchen.  About an hour after lunch time, I realized that Mikayla had been at my house for about 3 hours and I had not even thought about checking her diaper.  She was soaked.  I have gotten so used to Bella going to the potty or telling me that she has to go, I forgot what it was like when she wasn't at that stage yet.  I looked at my tall, long-legged talkative girl and realized how much one year changes a child.  Bella is already too tall for many 4T pants and now I have to buy her size 4.  Gone are the days when my kids were squishy and round.  Now they are long and bony and too busy to be cuddled much.  I never thought I would forget distinct aspects of what having a baby in the house is really like, but already my mind has shifted to other developmental milestones and activities - things I knew would come and even looked forward to, but I never realized how much of the past would fall away.  I was putting clothes in Elias' dresser the other day and the shirts were so tight, I had to practically stuff them in.  I was reminded of when I put his baby clothes in there when he was first born and how tiny they were inside that big drawer.  And one day, I will probably be folding clothes for him that are bigger than my own.