This is a park where kids can totally lose themselves in play! There's an entrance fee, and one of the highlights is a 110-meter-long roller slide. Besides the usual playground equipment, there are also animals to see.
A Toei subway one-day pass costs JPY 700. There's also a special one-day pass for just JPY 500 that's available on Saturdays, Sundays, and holidays during certain times.
Inside AQUA City, there's the Tokyo Ramen Kokugikan, which has six famous ramen shops. The Hakata tonkotsu ramen from Hakata Daruma is great—the ramen and gyoza set is a perfect combo.