Today as I was singing to the butterflies on my street (supposedly it extends their lives), I was thinking that it would be nice if I could give my butler a stack of items that he would give out at random intervals when a specific kind of action is being performed on my street.
So for example, if I want to encourage butterfly singing, or perhaps tree watering, I could give my butler a stack of something of decent value, and then if someone comes to my street and is performing the actions I want to reward (butterfly singing or tree watering), my butler would then offer them this special gift.
This might be especially useful for people with gardens (encouraging players to hoe/plant), wood trees, etc.