There were kids who were with us in the Sea Lion encounter. The first 25 min is a trainer speaking about sea lions in almost a mini class room setting. For instance, their face and whiskers are very very sensitive. What makes a sea lion different from a seal? And so forth. And then we all get in the water and get to get up close and personal with them and feed them. The little kids with us were delighted. You never know how day or a dolphin swim watching a trainer etc. might inspire them to look into marine biology or science. And the reefs at Chankanaab, I must have spent at least several hours swimming with the fish, checking all the holes for eels and holding sea urchins. In Grand Cayman, we swam with wild natural enormous sting rays and got to hold them and see them upclose. In Hawaii, we walked on the giant crater that is Volcanic Natl Park, wow. I haven't been to Alaska, but that would also make for an incredible learning experience too.
I seriously disagree that reading about all this in books or watching a movie about it can replace that. No one will ever change my mind about it, since I experienced it growing up as well. (public school thru 5th grade, homeschool middle school along with vocational highschool.)
Additionally, I just watched an amazing trailer for BEARS by DisneyNature that is coming out on Earth Day (it looks wonderful! I hope its on the ship when we are). Disney is more than fake stuff. Animal Kingdom puts you face to face with giraffes and is frankly the closest I think I'll ever get to the African savanna any time soon.
To me, the bottom line is: Parents who want their children to learn in life have every right to take their children with them to see the world whenever and wherever they like.