The venue is big enough that even on busy days there's always something to see or do. The earthquake experience is always going to have a line so don't be discouraged by that.
Not to bad
Shouldn't be too bad. We went on one of those crazy free days, and it was packed. The popular earthquake demonstration had a line that took about 20 minutes to get through. That's the upper limit, I guess.
Thank you all!
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