There are some nice restaurants, a couple of take-out windows(pizza is one), a nice bakery, a sweet shop, a bunch of games of chance, there's usually some live entertainment(a juggler or something like that). I enjoy the BW as a nightspot. To me, it's less "in your face" than Pleasure Island, but there's still plenty to see and do. The pace is more relaxed than PI. I think your kids should find enough to keep them occupied and enjoying themselves.They have little tables scattered around near the food places, so if you stop and get a snack or a treat, you have a place to sit, and you're looking out over the water...very nice.
A little FYI...over in the Beach Club is a cute little restaurant called Beaches and Cream, which is a great spot for a casual dinner, or a nice ice cream later.