Besides the resort of Schevening there is also Kijkduin in the Hague.  There is a great beach, restaurants and shops.  In the summer the restaurants right on the beach are open.  In colder weather there are plenty of very good restaurants along the top of the dike featuring Italian, French, Mexican and of course Dutch cuisine.  Kijkduin is a great place for the whole family to play in the water in the summer.  There is playground equipment set up on the beach as well as a small ship and carousel for kids' enjoyment along the dike.