There's a catchy song stuck in Kelp's head, but his friends can't hear it! Can they re-create it by finding the right sounds and putting them together?

The ocean kids are turning part of a sunken ship into a playground, with a hoop tunnel, a clam-go-round — and hopefully a slide. Time to get to work!

After accidentally toppling a boulder that blocks the waterfall, Kelp is shy about using his spark. But life without it isn't nearly as much fun!