Hi Nicole !
Be sure sand does no harm (LOL), we live in front of the beach and DS loves it, always eats some sand and drinks some sea water too, no problem at all
What I did when we started taking him to the beach was to take an inflatable pool and lots of toys, then I would go with him near the sea while DH picked the water from the sea to fill the pool, so he would see where the water came from. Only after he was totaly confortable with the pool we started taking him to feel the ocean. In our case we do everything very slowly cause DS is quite touchy and can easily get scared with anything and in the begining he was very scared of the waves.
I always take some blocks to play making sand forms, fruits are also very much fun, with no concerns of trying to keep him clean.
Just remember that her As will probably be slightly shorter then usual, b/c of the sun and exercise. My Lo always takes long naps when we go to the beach, it's really tiring for them. Lots of sunblock and water and you are gold.
Hope you have lots of fun ! Enjoy !