Painfully Shy in Public, Spirited at Home (What's Up with That?)

A parent describes her 3.5-year-old as fun, loud, and opinionated at home, but "painfully shy in every other social setting," even with relatives and peers she knows well. She's greeted with enthusiasm but won't join in. Instead, she asks her parent to play with her. This issue is especially noticeable at gymnastics, where she'll happily do an activity, then suddenly refuse to continue. No amount…