About $12-14 for adults. They also have discounts for groups and occasional Groupon/Amazon discounted tickets. Plus, if you come late and don't finish viewing all exhibits in one visit, they sometimes offer complimentary return vouchers.
$12 if you're not a member. If you join the guild, free. There are a lot of perks for joining, it's well worth it!
What is the cost of the membership?
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