Maybe we could study music and then be able to sing to butterflies with energy, mood and xp gain, or sing to trees and piggies and rocks and receive special bonuses. After mastering these skills we will be able to do some tricks with music boxes (maybe tuning or creating them?)
Maybe we could even sing to the crabs!
Singing could be more difficult after eating some foods (sno cones, ice,..) and super easy after others (we have lots of new herbs, for example).
And we can sing in the caverns for special echoing effects. :)