Just going around Gridania, and the NPC Sylbyrt (in the Adventurer's Guild place) says:
"Have you heard of the magical tree stump within the Twelveswood? One need only place a broken item upon it - be it toy, tool or weapon and it will be mended shortly after.
It is the work of the Moogles who speak to the elementals within. Or so the Gridanians would have you believe."
I found this interesting. Maybe it's another take on the repairing process? Anyway, I searched, so sorry if it's been brought up before.