The splash pad will be pretty neat, LOL! We have seen what it looks like and the waterfall in the corner is pretty cool, a natural rock type waterfall, and the splash pad looked like they were finishing it up yesterday maybe, with all the bricks and paver stone things. From what I heard, it is going to have water jets that come up and they are pressurized with the oxygen/air removed, and laser lights will shoot through them, so it should look incredible!
If you have seen the kiddy fountain at Easton Mall down in Columbus, it is going to be similar to that I think, with the water coming up and you can walk through it, or at least that is what it looks like. I bet it will look even cooler at night with all the colored lights and stuff they have installed!