When I entered, I entered it by displaying the QR code from the purchase screen of the app, so it was very convenient because I didn't have to search for an email. Since we were limiting the number of visitors to prevent corona infection, we waited for about 20 minutes to enter (14:00 on weekends), but we were able to enjoy it without worrying about being crowded. The child (1 year old) was a little scared at the beginning because there are many dark places, but he got used to it from the middle and was happy in the second half! There is a place where you can immerse yourself in the water up to your knees, so it is recommended that you wear clothes with a hem that rolls up on the day. (It seems that shorts are also available for rent) It's completely indoors, so it's recommended even on rainy days!