I downloaded this on my Kindle Fire HD for my 3-1/2 year old grandson. He already knows all of the names and characteristics of the dinosaurs, but this app gave him sounds too. Several times a day my grandson and I sat and listened to the dinosaurs growl. I would highly recommend this for kids who love dinosaurs.
I bought this app for my four year old who is obsessed with dinosaurs. He loves it and is entertained by the pictures, but the app would be perfect if it had a feature that read the content. Maybe it does and I haven't found it. Other features are Dino sounds, semi-interactive map, and really nice illustrations. For $3, I expected it to have a reader included.