J.P.
Unless you want to go to Disneyland and switch off who gets to stay with the baby (you can go through the line, and switch off when you get up there without having to wait in line again), I think it would be a waste of money. My husband and I did Sea World when my son was 10 months. We were actually only there for the dolphin swim and switched off for that, but if we didn't have to race out right after that, I think my son would have enjoyed it. Probably would have also enjoyed the zoo too. But what about just going to a quiet beach (free!), or a nice park? If you want to go to the other places, do, but I doubt at 12 months that s/he really cares.