We go to the beach to be outdoors: to soak up the sun, splash in the waves or grill in the yard of a beach house. But there’s much more to do by the ocean than lie on a towel and bake. You can learn to surf, ride a bike to a picnic near wild horses or paddle a kayak in search of bald eagles.Just remember, though, that even if you’re not stretched out on the sand, you can’t forget the sunscreen.