Kids 3 and under are free! Youth aged 4-12 are $9 and 13+ are 15. Memberships are really affordable though. For $65 you can get your two adults and all children under 18 in, plus come back throughout the year as many times as you want! If you have a family of four it pays for itself in two visits.
I'm not sure. I homeschool, so my son and I were free. My husband's admission was around 12$ I believe.
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