Hey Charles! We don't have a way to check balances online at this time. Feel free to call us at the park you used your card last. Provide us with the number on the back and we can check the money and tickets balance on the card. If you come by we have several Kiosks and Check Card stations at the park to check your card at anytime. Thanks and see you soon!
You can also check on their website.
Ask it nicely. Sometimes those cards can be rude though
They have a card machine that tells you how much or you can ask them at the desk
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