Its self guided and also depending if you read and do everything and how many people are there. I spent at least 2 hours there because we did all the interactive and read everything.
It's basically self guided so as 2 adults we did it in an hour but you can spend more time if you want to read more of exhibits and what not
Can be done in an hour or so! But take your time. It's a lot of fun and tons if info in it
Exhibitions are done in hour, hour and a half easy... but the games and activities, you can take as long as you want and they're really fun
My son and I were there about 2 hours. Could be done faster.
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