Join Mermaid Barbie and Samika the seahorse on an amazing underwater journey! Everyone in the ocean city is preparing for a big celebration, but the light from the magic shell has faded! Help Mermaid Barbie follow the sparkling path to find the rainbow dolphins and return the light to the shell before the event starts! Hand out invitations, play musical instruments--even create a song along your way! Plus, decorate the city and invite your undersea friends to the magical sea celebration!