Shapes are everywhere, and math students get a chance to explore shapes and their attributes, all while having fun. Familiar storylines and relatable contexts help students practice various principles of geometry, such as composing two-dimensional shapes, decomposing and partitioning shapes, and distinguishing between defining and non-defining attributes. Bright visuals reinforce the essential math concepts that every geometry student must master. In this narrative, Jackson's having a surprise party, and the shapes he sees at his party will teach him, and readers, how to distinguish between defining and non-defining attributes. This volume satisfies CCSS Math Standard 1.G.A.1. This book should be paired with Surprise Party! (9781477721032) from the Rosen Math Readers Program to provide the alternative point of view on the same topic.