One of my favorite days ever was when my older two were in jr high, and it was field trip day. The main office was glass walled and sat in the middle of the school. I was sitting in there with a bunch of the other parents, waiting to go to the classrooms, as the kids roamed the halls. Several of the kids smiled and waved at me, a couple stepped up to the glass and made faces, one or two poked their head in the door and asked if I was going with their class. I told them no- my daughter didn't want me going that year, so I was going with my son's class. They looked offended and said they would have invited me.
It's amazing the impact you can make with kids when you are just there... and listen to them. Cherish those years and enjoy that chaos. It goes quickly. As much as I did love it.. I am now really enjoying the high school and college years. There are new challenges and adventures all the time.