Ira Sleeps Over! I always read that to my third graders. Ira learns to just be himself and at the same time learns that others are just like him, no matter what his sister says! One follow up activity we always did was to finish the ghost story Reggie started before they fell asleep. As they were writing their stories I played a tape of spooky Halloween sounds. They weren't expecting that but they loved it!
There is a free pdf that has the entire text (RT format) along with questions for discussion. TPT also has some low cost and FREE activities.