The tickets are available for purchase at the gate and they do offer discounts for students and military. They also offer a pretty decent membership you can join if you like going there.
You can buy them there. Don't forget to check out the varies discounts!: Senior student military discounts
You can buy tickets at the gate
Advanced Reservation required: All guests, including members, are required to reserve a ticket before visiting. All staff and guests (2 years and older) are required to wear a face covering over their nose and mouth — both indoors and out — per state, local and CDC guidelines. Social Distancing: All families or groups must maintain 6 foot distance at all times from staff and other guests. Adults are responsible for ensuring children follow this rule.
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