Download or read book Problem at the Playground written by Courtney Carbone and published by Undersea Mystery Club. This book was released on 2019-10-08 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: When pieces of equipment start disappearing from the new Aquamarina playground, it's up to Violet the mermaid and her best friend Wally the narwhal to solve the mystery. Back matter includes ocean science and civil engineering facts.