Mrs. Norrell's classroom is a truly magical place! Madison loves helping people. So when it's time for her class to plan an activism project, she knows this is her chance to prove she's a leader. But when her ideas get shot down, she starts to feel small ... really small. In fact, Madison turns into a mouse! Madison is panicked. Leaders do NOT have squeaky voices, whiskers, and tails! To change back, she will have to prove to others, and to herself, just what tiny beings can do—but first, she has to avoid getting stepped on.