Claudia enters a baking contest with the help of the other Baby-sitters, and has good chance of winning first place. When someone starts sabatoging the entries, they set out to solve the mystery before Claudia loses the bake-off.
Presents experiments and projects to explore what happens when batter and dough turn into cake and bread. Emphasizes the properties of baking powder, baking soda, and yeast.
In Acton, Oregon, sisters Alex, Stevie, and Joey take turns telling about their lives, including auditioning for the same part in the school musical, baking contest-worthy cupcakes, and becoming obsessed with "Little Women.".