The major reason for Yas Waterworld Tickets price to be based on the height of the guests is that some of the rides will have usability restrictions, as people below or above a certain height could not enjoy some specific rides. This practice is not unique to Yas Waterworld and is instead a standard set in almost every theme park around the globe. Yas Waterworld offers guests below the height of 1.1m almost every ride in the waterpark. However, there are few rides that will not be safe for children/ people below this height. Therefore the park follows the rule of pricing tickets based on the visitor's height.