K.H.
If he is interested in dinosaurs, you are in luck. Colorado has mountains full of dinosaur remains. I suggest go up to mother cabrini's shrine on your way notice the fenced in dinosaur foot prints on the side of the road. Dinosaur national park is on the border of colorado and utah. There is 4 corners or mesa verde and excellent hands on anthropological education. If he is truly interested in dinosaurs he may have interests in, geology, anthropology, and history. There is also the natural history museum in denver if that's what they still call it. If you want something cool go to their gift shop to find something that is cool but also educates.
best of luck,
K.