We used the Sandcastle Club for our 2 kids on our trip last April. They were 9 and 4 and they had a ball. DD had her cell phone with her so I felt good knowing if she needed to talk to me or if her brother needed to talk to me they could whenever they wanted. We did also get a pager from the CM's. My kids had dinner there and had a fantastic time. They did not want to leave and begged to go back on another day. I did give my DD a call when they were there and she was having so much fun neither of them wanted to talk to me!!LOL That made me feel great! They colored, did arts and crafts, sand art, made key chains, had dinner and snacks, played games watched movies. It was really nice in there too. It was private and clean. They have a bathroom in there and the potty was low and so was the sink so it was easy for little ones to reach. They had so many toys and games my kids eyes lit up when they walked in there. They also had a section where the big tv was on the wall. There was a place for the kids to watch. They told me when it gets late, around 10pm they take all the kids to that section, give them milk or juice with cookies and put a movie on for them to watch with pillows and blankets! I would take my kids there again in a heart beat and they can't wait to go back!!
I have taken DD to the Neverland Club and she loved it there too. She was about 6 at the time and her brother was too young to join her but she loved it. Personally for me it was a little too dark in there and there were a lot of dark corners. When I went to pick up DD there was a little girl crying by herself in the one of these dark corners and no one noticed. I stood with her for awhile and not one CM came by! I comforted her and them found a CM to let them know they had a kid there who wanted her mommy! They were very good with my DD and she had no issues there at all. Only thing was the bathroom in there was filthy. I did tell someone and they seemed to get right on it. Because of my kids ages, and because my DD can look after her little brother I would let them go there because it is so cool the way it is decorated!
If I had a shy child and one that might not do too well on their own I would prefer the Sandcastle Club because it is smaller and the kids get more one on one attention. When our kids were there they were lucky because it was only them and one other kid with 3 CM's!!
After dinner we walked around World Showcase and then back over to the Beach Club to get the kids. They were there for a total of 2 1/2 hours. 
