Second-grader Stink's parents tell him he must play a sport after he gets an unsatisfactory grade in physical education, and so he masters thumb wrestling, as seen on a sports channel.

While competing in Spirit Week events at school, eight-year-old twins Zach and Zoe follow clues to find Zach's missing baseball, signed by his favorite major league player.

Ryan wants to form a curling team at school with A.J. and Andrea, but soon trouble amongst his teammates threatens to end their season early.