There's a system of pipes which has its own gravity and its own spatial arrangements, which only makes sense to kids who've grown up in the castle and only before they turn seventeen.  To get a message you give it to somebody who hands it off to a kid if they see one or alternatively hands it to somebody else who might run into a kid, etcetera.

There's a system of pipes which has its own gravity and its own spatial arrangements, which only makes sense to kids who've grown up in the castle and only before they turn seventeen.  To get a message you give it to somebody who hands it off to a kid if they see one or alternatively hands it to somebody else who's still moving and might run into a kid, etcetera.

There's a system of pipes which has its own gravity and its own spatial arrangements, which only makes sense to kids who've grown up in the castle and only before they turn seventeen.  To get a message you give it to somebody who hands it off to a kid if they see one; or alternatively hands it to somebody else who's still moving and might run into a kid, etcetera.

There's a system of pipes which has its own gravity and its own spatial arrangements, which only makes sense to kids who've grown up in the castle and only before they turn seventeen.  To send a message you give it to somebody who hands it off to a kid if they see one; or alternatively hands it to somebody else who's still moving and might run into a kid, etcetera.