April Fools' Day turns into a bad day for Wagner the mouse when his best friend, Pearl the rabbit, and other children and adults at school play tricks on him.
Elizabeth Cole and her best friend Felicity are known as pranksters in colonial Virginia and their favorite target is Elizabeth's older sister Annabelle; but when Annabelle becomes engaged, the girls get into big trouble.
Spud and Joe are determined to catch the mysterious prankster who keeps getting them into trouble when they spend their summer at Camp Custer with Mary Frances Hooley and Lamar J. Spurgle.
Wally and his three brothers declare war on the three girls who move into the house across the river. The three Malloy sisters try to get even with the four Hatford brothers.