This is a must do for us. The only problem we have is keeping an eye on more than one kid at a time. I'd feel better if they hand-stamped us on the way in like Chuck e Cheese. I take my DD's by myself and when they are running around the caves and climbing it is hard to keep your eye on them.
The other part over the bridge is a "dig" where this mulch like material that feel like gound up cork hide a dinasour skelaton and the kids dig it up. This is a great time to grab a coffee and sit on the benches around the pit while the kids dig.