Undead...backpacks?

So DD apparently has two "undead backpacks".
WTF?
So it turns out the backpacks are actually "living" (not that I'm sure what that means, either).
I had to explain that "undead" tends to refer to things that have died and come back to life, usually as something creepy, ghoulish, or ghostly.  Living, on the other hand, refers to things that are still alive (at least for now, and yes, that's how I put it).  Things that are dead are just dead (she pretty much gets that part already).

Beware if you don't want your kids picking this up - I believe this came from the Skylanders video game which, yes, is pretty awesome, and no, I am not affiliated with the company (though watching the sales I wish I were).