T.H.
I have never heard of Kalahari so I just googled it…it looks awesome and I totally want to go there!! :)
We have been to GWL and we love it! Our kids are 4 and 6 and we've been going for a few years. The slides are fun, there is a lot to do, but that Kalahari looks really cool too. It appears to have more slides which a 7 and 8 y/o would probably enjoy. If they are otherwise equal, I might try that one, but either way I'm sure you're going to love it! I find that staying in those types of places are really fun and make the trip exciting without having to go anywhere extra!