Playing in water in scorching Dubai heat!? What more can you ask for. And there are some really good rides especially the scary Jumeirah Sceirah which me and my 9 year old son really enjoyed. And we had some great views of the Burj Al Arab, while in queue for Sceirah (so who was complaining about the queues?)
Do get your towels and swimwear and your cameras too. But if you don't have one, the shop here stocks everything from swimwear, slippers to towels and other stuff.
This is the place where we could really interact with the locals and I found that they are very friendly people. The staff here are mostly outsiders but helpful and nice.
We came out all tanned and tired and hit the hotel bed with the satisfaction of a well spent family time.