This is the story of a little girl and her pony. Dianne lives with her parents in the historic village of Gundaroo. One Christmas they called her outside and there was a little grey pony. Dianne could not think of a name that suited him, so she called him No Name. Dianne soon learned to saddle and bridle him herself and they had many happy rides together. One day Dianne came back from school very excited. There was going to be an historical picnic and all the children were going, dressed in period costume. This book tells of the costume Dianne chose to go in, and how No Name took part in the picnic too, and got a new name: Gundaroo Pony.