Passing notes

Im wondering…

is there any other way to pass information from the real world to the dream world and vise versa other than your mind?

im sure there is a way to write something on a note…put it in your pocket and because you know you wrote it in your dream world you can take it out and read it…there has to be some way to do this. If there is a world with unlimited possibilities im sure you can pass information into it…and if you find a way to do this…you could probebly make it more advanced. Somehow make your friend knwot hat you are in the state. then get him to talk to you and maybe somehow you could talk back. Something to do with lights maybe?

That would be so awesome! I read somewhere about this, it seems familiar to me. We should have someone more experience with LD to try this out.