Big kid class

About a week ago, I got a letter from Miss C's school that she will be moving to the big kid class this week. I met with the teachers last Wednesday and had my orientation while Miss C napped down the hallway. After orientation, during which I learned that Miss C won't be able to have her numnum (that what she calls her pacifier, if you are new to the blog), I started to talk to Miss C about moving into the two year old class.
On Thursday, on our way out of school, Miss C and I walked down to her new room. I thought it would be a good idea to show her where the room is, what their toys look like, etc while the other kids were playing outside. We also looked out into the two year old playground, which, gasp, has a big slide, lots of little cars (her absolute favorite) and a sandbox!
The next day, Miss C reported to her current teacher that (pointing to the other playground) "I go play there." She seemed to be starting to get it. We talked about the move all weekend, just here and there, about her being a big girl and being honest about not being able to have the numnum in the new room. I reminded her of which friends are already in that room, all of the fun toys, etc.
Today, before I left for work, we talked again. I reminded her that sometime after breakfast, Miss J would walk her to her new room. I reassured her that she would have fun, that she could give Miss J a hug bye-bye and that if she had any problems, she could go back to the other room. When I left, Miss L, the nice woman we all check in with in the morning, reminded me that I can always call to see how she is doing (she knows how I think and that I will probably call).
I guess I should know better by now. I called a little after noon, enough time for Miss C to see if she was ready to spend more time in the new room, enough time to find out if she would be ok without the dreaded numnum. As soon as Miss L knew it was me, she told me "Oh! She's having a great time! She signed and talked about going to the big girl room. She said she was a big kid and that she was happy! She's sleeping right now." I asked "In the new room?" She replied "Oh yea, she is doing just great!"
Yep, that's my big girl, in the big kid class. Why does that make me a little sad?