Quick-thinking third-graders Lizzy, her twin, Connor, and their friends Kym and Deon have a big idea: their school desperately needs a new mascot, and they've got the perfect one in mind. Now they have to figure out a way to convince their principal and rally the rest of the school behind them. Luckily, their teacher, Miss Zips (short for Zipsokowski--but who can say that?) is skilled in the art of persuasion. Armed with Miss Zips's persuasive tips, the gang of four set out to make their claim, build a case for a new mascot, and convince Clay Elementary that Arnold the Armadillo has had his day.