Yes, there are all kinds of fun rides for her! My suggestion would be to go get her height measurements when you first go through gate and they will place a colored band on her wrist and all rides she can ride will be color coded on the map of the park! Admission for 3 years and under are typically free!
The website dollywood.com can give you that information
Yes she can do a lot there but the ticket I dont know but download the dollywood app and it might tell you
Thanks! Your answer is awaiting moderation.