Grand Theft Auto: Vice City

Keepie-Uppy beach ball is a small minigame found within Vice City that requires you to juggle a beach ball by hitting it with any part of your body. Beach balls can be found both randomly in the Washington Beach area of Vice City, as well as it predictable locations throughout the game. The easiest location to find a beach ball is on Starfish Island, within the empty pool of the property north of Diaz's mansion/Vercetti Esate (see the video below for the exact location).

To start the mini game all you need to do it walk into the beach ball and it will be launched into the air. Now you need to move around and position yourself under it before it lands in order to bounce it back up into the air. A small counter appears above your head which represents the consecutive number of juggles you have performed. If the ball lands on the ground you will have to restart. The ball can be hard to track in the air as it often goes out of view, as such the easiest way to track its position is by following its shadow on the ground. At first it may seem difficult but you can position yourself directly under it, resulting in you not needing to move at all. Once you reach a total of five consecutive juggles, the trophy will unlock.

The following video shows the exact location of the beach ball within a property on Starfish Island, as well as how to unlock the trophy: