[The idea of having time to be a child is an odd one to L, likely because he inhabits both the world of having to grow up too quickly, and the one of never managing to do it at all.]

Maybe not the only point...

[He reconsiders out loud as he reaches out to turn the bottles' labels to face the same direction, only because Illarion seems surprised by the answer. It's perhaps the surest indicator that he truly believes that curious thing he said.]

It's just that boredom often brings with it idle time... which is not quite so plentiful, if one's days are filled with the excitement of other matters. Adventure, survival... pressing priorities that can't afford leisure.