A magical mermaid adventure from New York Times bestselling creators Kimberly and James Dean!

Pete the Kitty and his mermaid friend Jessie work together to build a sandcastle. But the castle is missing something. Will one shell, two barnacles, three strands of seaweed, and more gifts from the sea be enough to make their sandcastle the best it can be?

Young mermaid fans and beachgoers will love building and counting with Pete and Jessie in this My First I Can Read story.