If you go into the lost woods and have a good look around (i think you go left after the 'zora domain warp bit') you will find a path that leads you into an empty space apart from a tree and long grass. It this long grass is a hole. (this is in the lost woods to remind you again! Just don't wana lose you!)
If you go down it you will end up in some sort of game? I dunno. It has lots of deku creaters hiding (i think) in it.
There is a sign and it says:
Forest stage We're waiting to see your beautiful faces Win fabulose prizes
Im guessing by the 'forest stage' bit theres more than one of these places. It quite well hiden so it won't be easy to find the others (i think!). But what is it?!?! Someone must have found this out. Its random and annoying me. WHAT IS IT!!! Plz wb!! Ty xx
Oh and by the way - yes I know this isn't important to complete the game. As I'm sure 9/10 people who read this probably have completed it.