A tiny toy dump truck, no assembly required.
Captive wheels and dump box.
Inspired by toy tanker truck by jag http://www.thingiverse.com/thing:5273
The picture shows the series of intermediate designs.
The wheels will most likely need to be broken free (just grab both sides of a single axis and twist) and some manual cleanup around the axle holding the dump box to the body will most likely be necessary.
Print was sliced with Skeinforge:
Layer Thickness: 0.2mm
Perimeter Width over Thickness (ratio): 2.5
2011-07-05 The new -V2.scad file fixes a bug that occurs if you attempt to change the wheel_dia or body_lift variables. Otherwise, the design is unchanged.
2011-12-14 Added version 3 (V3) files. This version shortens the bed axle a bit and adds a cap to the bed axle sleeve. This constrains the bed so that it cannot slip so far out of alignment with the truck body when the bed is raised.
2012-01-03 Repaired all files so that they are manifold (according to the netfabb cloud service).