They waded in the water, explored the sea caves, spied the sea lions sunning themselves on a rock just off shore. From Shell Beach you can see Seal Beach (which is technically named Childrens Beach because it was designed as a sheltered area to make it safer for kids to swim. The seals think it's a pretty sweet place, so they took it over almost as soon as it was built.
Watching the seals was hilarious. They were crawling all over one another. The kids were pretty much over it all at that point, so we grabbed some gelato and headed back to the hotel. They wanted to go in the swimming pool. Which I pointed out they could do at home...