Adults are 32.99, children ages 6 - 11 are $17.99 and ages 2 - 5 are $7.99. I don't think it matters which day of the week you go, the prices are the same. Check online for discounts. I think ordering tickets online saves money, too.
Also, look at the combo packs for multiple Ripley facilities. It's worth every penny (about $50) and gets you into three different venues.
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