Yes!!! We went last year & have booked to go again this year!
it is fine for both those ages! Our ds was 2.5 & dd was 5.5.
There are 2 pools outside & 2 inside & a jacuzzi. The wee pools are fab for the kids, nice & shallow so they can go up & down the kids slides by themselves. My 2.5yr old was at the pool for the very first time that holiday & we went twice a day!! By the end of the week he was a pro at wading through people for a go on the slide!
There are lots of different wee parks too, we were near one at the bread shop, our caravan was just at the very edge near the washing facilities & every caravan had their own table, chairs & BBQ.
There's a lake to take a wee boat out on & the kids get life jackets to wear. Also trampolining, see-saws....
I could go on!! We loved it & would recommend it to anyone. The people were all very friendly, the entertainment was very child friendly & it was a very safe environment.
We travelled to Disney in our hire car & it was extremely easy to get to. In fact, I would recommend driving with a 6 month old, as it may be a long day if you have to wait about for a bus to take you back to the site.
The site its-self is big enough for lots of lovely long walks early evening. The restraunt is lovely, but does require booking as we found to our cost & had to wait in the pub for an hour.... I don't remember much of that night
If you have any more Qs ask away & I will try to answer them