*** SPOILERS *** (kinda??)
What do you do with the secret locker stuff and the buried box? I know that if you splash water on the secret note then some fun numbers appear, and if you combine the coin with some yarn then it turns into a medallion, but besides that I'm completely lost. I'm not sure if this just hasn't been implemented into the game or something, but I've tried combining it with everything I possibly can, as well as exhausting every bit of dialog possible. Any help would be appreciated.