Here's what I'm seeing: (Top = Frame 1, Bottom = Frame 2)
As far as I can imagine, they're not the giant hauling wagons, but more like a bunch of Radio Flyers.
EDIT:
Just for the hell of it, I dropped a wheelbarrow into the magma pipe, and instead of dying in the heat, it drowned.
No remains were to be found.
UPDATE:
-Butchered a wagon, and got me 12 wagon chunks, meat, and bones each, and a wagon skin.
-Produced a pair of -Wagon gauntlets- (6 wagon bones each). Unusually light. 1 dwarfpound and 30 dwarfbucks each.
-Wagon meat is a popular delicacy.
-Wagon chunks rotted away, apparently.
-I forgot to store indoors to see if miasma came from the remains. Oops.
-Indoors = no smelly. That tag works.
-Now I have produced Wagon Leather
(what should I make out of it?) -Made some standard Wagon Leather Armor, and it's ungodly heavy. 718238 Dwarf Pounds, and valued in at 20 dwarfbucks.
-Leather worker was rather speedy and decent strength, and it even took them a bit of time to get to the nearby stockpile.
-For the hell of it, I attempted to drown a wagon in water.
-It climbed out.
-I figured it out. It's the [SIZE] tag that's responsible for it.
BUG REPORT:
-Wagon leather on it's own is ultralight (1 DP), but once crafted into something, it weighs more than the Earth itself. Is this possibly a (Natural?)ly occurring anti-mantine?
-Okay, well, a Wagon leather buckler is near weightless, but the shield says otherwise (damn heavy)
-Armor is just as heavy
-No oddities regarding bone crafts and armor. However, I find it rather apt that most of the crafts are ring crafts and scepters with the occasional crown and idol.