We spent about two hours making a fairly leisurely loop. But it's the sort of place you can find new things over and over again.
You can leisurely stroll and enjoy the sites or just walk through. I would suggest at least 2 hrs. I would also suggest eating at the on site restaurant, it is wonderful!
At least 2 hours for the park itself. There's a gift shop a cafe, and a show room.
You could take all morning/afternoon or just an hour or so. Depends on whether or not you like to dilly-dally, see the museum, eat in cafe, etc. I recommend taking your time and adsorbing it all.
Depends but I recommend giving yourself at least 2 hours.
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