Already a customer? Click here to login. Big Saturday is a fun event where you can drop off your kids for an incredible night while you get an evening to yourself! Kids will be treated to games, time to jump and play, and pizza. This evening event is for children ages 5 and older. You do not have to be a member at Gymsport to come to Big Saturday, but you must register for the event by the Friday before. Please log back in to the Parent Portal after registering for Big Saturday to process a payment if you were not given the opportunity to do so upon registration. Thank you! We're sorry but this event has been reserved. Please review our calendar for another available date and time. Thank you.