I haven't stayed at the other beaches, but recently I spent a long weekend at Daytona Beach with a bunch of friends and I really loved it there. I'm planning on taking my kids there next month. I think especially for your kids ages, there is plenty to do in DB. the sand is packed but soft, like walking on velvet. You can't drive on the whole beach, just parts of it. We stayed on the driving part last month and drove our rented convertible on the beach, pretty cool! Got to see parasurfers, parasailers, surfers. Lots to do there too.