The day Priscilla gets a book about gorillas, she instantly becomes obsessed. She dances like them, eats like them, and wears her gorilla costume 24-7! There are so many things to love about gorillas, but what Priscilla loves best is how they seem to always get their way.

So when Mr. Todd tells all his students to dress up like their favorite animal, Priscilla's choice is obvious. But dancing around and beating her chest when it's not her turn sends Priscilla straight to the Thinking Corner. She is of course outraged--nobody tells a gorilla what to do!--and as her attitude spreads, soon the thinking corner is full of her classmates. Is Priscilla really channeling her inner gorilla, or is she just a troublemaker in ape's clothing?