Mystery Reader #6: A Visit from a Big Sister

This Mystery Reader provided the following clues: "I have brown hair.  I am in 4th grade.  I have a brother in your class.  My favorite color is orange."  We have a few students with a 4th grade sibling, and so the class took it in their own hands to do some research during the day.  I found out that they stopped our Mystery Reader in the hall to ask her if she was our surprise visitor, and she quickly covered up by saying, "What's a mystery reader?"  Her quick thinking threw our class a curve ball!  She shared A Green Wilma story with us by one of our favorite authors- Tedd Arnold!