Over 3,470,000 copies and ranked 6 in Japanese picture books. This is a renewed version of the fun secret mascot in the "Neeko Who" bath ball published in 1969. Loved for half a century, storybooks have been read and heard for three generations from parents to children, from child to grandchild. When you open the package like the cover of a storybook, the purple bath ball will be When melted in hot water, the characters featured in the picture book will randomly float from the bass ball. The added secret mascot will change color when you put it in hot water! ? Recommended for parent-child communication tools in bath.