There is a casino located right on the beach at Le Treport, which I never actually visited because at the time I wasn't of age. Its called "Casino Le Treport," and inside there's supposed to be game rooms, as well as shows going on, a restaurant, lounge, billiards and piano bar. For info you can reach them at the number below.
Climb over the stair to get on the top of the hill, or park directly your car close to the Christ statue, and step in the tracks of the cliff...
Every French seaside town has a traditional French carousel. Exquisitely decorated and pumping out tradtional French tunes aka 'Frere Jaques' et 'Il etait une Bergere' et al. You can ride on it - not just for children
Looking for a seafood restaurant ? You can't miss them ! Just go along the main road that follow the sea front, and you'll see a bunch of restaurant. Prices are usually more expensive than the Saint Valery (more at the noth) sea food restaurant, but you may find the one you're looking for ! Just read the menus at the enter to check and then "bon appétit" !
All along the coast from Dieppe to Calais you fill your vehicle up with Wine ,Champagne, cheese etc. Bring back enough for the year and at fantastic prices. -Don't drink it all before you reach the UK other wise you might have a problem!