Oceanside is lovely. We go during the winter, so we often have the beach mostly to ourselves, and we wear wind breakers and don't swim too much. But it's still just lovely.
Hubby is better at enduring sand castles and stuff than I am, though I have been known to do my share. Usually Thing 1 is the castle builder, and Thing 2 is the wave runner.
My folk's condo is right close to the beach, so they're a cellphone call away to help out with the kids, or bring out some water or a chair, or take in someone who needs a nap.
This year when we took the shells we'd found on the beach back to the patio and were going through them, we found a little crab that needed to be returned home. We've never caught one so easily before.