Yes
You can interact with the animals in the farmyard through the fence for free, but to interact with them up close requires 2 explore more credits - which do cost money ($1=1 EC.) As far as free days, you may have to check their website for days that it would come up free - as far as I know they don't have a designated free day.
No.
Yep
Don't know. Look them up online.
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