Mrs. Kane is going to have a baby. Harry has mixed feelings about not being the youngest anymore, until he decides that the new baby will be a boy. He has his own scientific theory to prove it, and although he turns out to be right, his other experiments don't always work out as he expects. "Amusing and heartwarming....A lively, humorous read-aloud for those just beginning to tackle novels on their own."--Horn Book.
Used availability for Judith Caseley's Harry and Arney
June 1994 : USA Hardback