My son was 2 1/2 last year and he LOVED it! He thought running through the caves were so cool. We finally had to drag him away after about 45 minutes, because the big kids thought we were wasting too much "real ride time"! LOL
My only comment is to make sure you stick close to your kid. It's not like the smaller playgrounds geared for preschoolers at Magic Kingdom where you can sit on a bench and watch your child play. This one is more like the Dino Playground at AK or HISTK at HS. It would be super easy for you to lose site of your child, so you need to stick with them on this one. That was no problem for me though! MUCH easier than crawling around in the HISTK tunnels! LOL