This book is based on the hit PBS KIDS(R) show, Rosie's Rules. The animated show was created by two-time Emmy-award winner, Jennifer Hamburg.

Papá and Tía's Mariachi band is performing. When they find out a player can't come, Rosie jumps in to help. But what instrument will she play? Tag along with Rosie and learn about the mariachi instruments, all while grooving to some supertastical music!