The Tranquil Frog combines both sight and sound features- projecting gentle underwater images and playing soothing soothing sounds of the sea. This comforting combination makes for a super serene sleep space. Plays 2 soothing sounds: -Tranquil Melody -Ocean Waves Projects underwater effect with a gentle wave motion. Creators of the twilight turtle and sleep sheep, Cloud B specializes in products that help children sleep with white noise sound products and light products that turn.