You have to purchase the butterfly tickets when you enter the museum. They are $4 for members and $5 for non-members.
Visitors Under 2 are free. 2 and up are $20 per person for non members. $4 for members.
If you're a member it's an additional $3. Non members i believe $4.
The pricing vari3s on if you are a member or not. I havent been in the exhibjt in a while but last i remembered for members it waz 10$ per person i think.
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