I couldn't get close to the aquarium, but the Lego Center next door was quite accessible. I couldn't get into the aquarium because tickets were sold out, so I went to the Lego Center next door. The Lego Center itself was decent, but not particularly impressive compared to other centers in China. The only thing that really stood out to me was the Lego Center. There was an exhibition hall that had all of Osaka's famous buildings, including the cityscape, constructed with Lego. It was incredibly impressive. The castle tower, Kansai Airport, and the baseball stadium, Abe, were all impressive. For that reason alone, I'd give it a 5-star rating. The value for money is a bit low, but it's within the city, so going there during the summer means you don't have to be in the sun, and you can still have some time for the kids.