I just spent several minutes holding and hugging a first grader as sobs wracked her body. She was devastated that she did not get to share at the end of reading workshop. Of course, I recognize that this significant reaction was only very tangentially related to share. Mostly it's from all the various weights that she carries on her thin shoulders, most of which I don't, and probably won't ever, understand.
The only thing I could do was hold her tight and tell her that tomorrow we'll see what we can do about share.