No, there isn't a stew to help with farming. There is, however, a stew to make an adult have what you call "'A nature is calling' moment". Highlight to read recipe: Peacock style herb, Blue herb, red herb :End highlighting.
Yes, you can change the clothes of the villagers with the tech points.
Why is it a bad thing to have a lot of food? I'm sure you couldn't eat all of the food in your house!
No, the collectibles just show up whenever and wherever.
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And what if it makes you laugh now but you cry as you fall asleep?