Rosie finds out it's Abuela's birthday and prepares a birthday party in a box. She will send it all the way to Mexico! But how will the package arrive? Will a wizard take it? Or maybe . . . a mouse? Rosie and Gatita learn about the postal system and all the supertastical work behind mailing a package. Happy birthday, Abuela! - A book based on the hit PBS KIDS® show, Rosie's Rules. The show is nominated for a 2025 Emmy in the best preschool animated series category. - A great way to encourage children to build relationships with family members that live far away from them. - The perfect ode to all wow-mazing grandmothers out there and a delightful story to foster the bond between children and grandparents!