One play session is the total length of time you interact with your pet using SwiftPaws. The SwiftPaws remote controller is programmed to start a timer when you first start to play after turning it on. It will vibrate one time to signal the start of a session. After 90 seconds (regardless of if you are actively running or not) it will vibrate again and will shut down the machine. This is your signal that the timer is up.
PLEASE NOTE: Every pet is unique, and not every pet should go the entire 90 seconds. The 90-second timer is simply a feature to remind you to give your pet a break. Always watch your pet for signs of fatigue. Your pet probably wont want to stop on their own so it's up to you to tell them when to take a break!