Two reasons. No.1, children are naive and simple, all what they want on the sea is having fun, include all kinds of activities and games. Apparently, they love water as well. They can swim and play all kinds of sports on the seaside, more importantly, most of these children didn't grow up in coastal cities, their interests and curiosity, you know. That would be the main reasons. No.2, adults are experienced, what I am trying to say is that they have been to the beach many many times, they might find some interests there but it wouldn't be that much. Besides, the age is another problem. They couldn't take part in all kinds of activities on the sea according to that. So, I think this is why children like the sea better than adults in life. That is it.