Kids that age would probably have more fun at The flume. The youngest might not have the patience for the 4-Hour mine trip. Also might want to check if they have a minimum age for the tour.
Not sure, i took my 10 yr old and got the big bucket, she was getting bored. The mine trips call in advance they have to have a certain # of people for those. At least that's what they told us. We got a lit of nice gems
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