[Kakashi woke with a groan like a kraken and rose from the depths of his bed, jaw stretching into an almighty maw as he yawned.
With stumbling feet he tottered from his bed, to the window and threw the curtains wide. Who in the world was waking him at this hour?

Careful hands opened the window and picked the box from the sill. He didn't need to study it to recognize what it must have been; the firm grooves in the dark wood were unmistakably Tenzou's doing. Was it his birthday already? He could have sworn he'd just had one.

Later, when the box had been opened and Pakkun had been summoned to scrutinize his little wooden doppelganger, Kakashi sealed the scribbled note he'd hastily penned and gave the pug his orders.
Find Yamato, give him this and bite him for waking me up.]

Tenzou Yamato-
(I'm sure I'll get the hang of that eventually.)
Thank you.
If your guess was a ploy to draw me in for a rendezvous, it worked.
I doubt there will be anything major happening in my honor, but you're welcome to join me for drinks tonight with a few friends.
Don't be a stranger, now.
-Kakashi.

[The little wooden ninken found his place on the shelf overlooking Kakashi's bed, alongside his seven other counterparts.
Eight years had passed, a little ninja hound for each.
Ugh, Kakashi felt so old.]