Islands (hula hoops) are scattered around the gym. When you're on an island, you are safe! A max of 3 people may be on an island at one time.
When you are not on an island, you are swimming around the gym.
Look out! One person is an island stealer, and he or she takes the uninhabited islands and puts them off to the side of the gym.
One student is a shark! The shark is trying to get you (dodge ball-style) as you swim in the ocean between islands!
If you get attacked by the shark, you need to go to the center of the gym and hop on an ambulance (scooter) to get to the hospital.
When your ambulance arrives at the hospital, you are instantly healed. You need to take your ambulance back to the center of the gym...AND you get to take the stolen islands and put them wherever you like!
It looks crazy, but everyone knows what to do, and is having a BLAST!