If you need to fill some time in between visiting the Alamo or strolling the Riverwalk, and you have young kids, this might be a good option for you. It's certainly not worth the full price but a Groupon helped me with that (and I saw other coupons floating around while in San Antonio). The kids really liked it. Numerous videos playing of dinosaurs, a big screen with a scary T-Rex video, quite a few displays, a little gift shop, and a guy was doing little tours for those who are interested. That about sums it up. You'll be through in 30 minutes easily.