It was easy to go to Kaiyukan and may even have this tour on your own. My daughter enjoyed the trip to the Aquarium. You are allowed to touch the manatary/fish in a certain area after the aquarium tour. Unfortunately, I was not feeling well and we were not able to join the Osaka Bay Cruise. I stayed in the aquarium's clinic area. The staff were very helpful to attend to my needs. They strictly check if I had any allergies or fever before giving me the medicine. After the tour, our guide was kind enough to direct us where we can eat. This is a very good tour/area to go to for toddlers/kids, they will surely enjoy it, especially if they like animals.