Aaaaaaah, frustrating

Hey guys. My grandparents are here in Colorado, and we want to do something fun and exciting, presumaby up in Denver and I have been looking except nothing jumps out. We could go to an art museum that we have been to about 4 dozen times, or we could go to the children's museum but it is basically to babyish for us now. We can't go to a water park or an amusement park because my grandparents wouldn't like that and it is a bit colder than other days. Also, there are no other good or cool museums I could find. I will just wait and see. I wish I were in Atlanta right now for the...Coca-Cola museum!