I made cushwa's Owl smaller (about 40%) and put it on top of a 4x3 Lego.
Another version sits on a 4x3 Duplo.
With a recent good printer, this is can be printed decently enough. However, some details won't come out right, e.g. the hole in the nose. If you own an older printer (Darwin generation), try the Duplo version.
I printed the Lego version twice:
- 0.25mm layers
- 15% fill
- 15 mm/s first layer (and nozzle real close), 80 for the fills and 35 for the perimeters.
- PLA at 210 degs C.
Then I made a variant: horizontal and vertical half-layers for perimeters. The result was worse (owl to the right in the picture with both). Probably slicer settings need to be changed more radically to get this right. Maybe less speed, maybe a higher extrusion rate, skip horizontal half layers, ....
Sorry for my usual bad picture quality. Yes - when I have time - I will some day buy a camera.
The Lego/duplo bricks were created with OpenScad using Doblo factory (see http://www.thingiverse.com/thing:2106). The Lego version has tight fit (at least with my printer/my settings) and the Duplo version more loose fit.
The Owl on Lego is meant to decorate this: http://www.thingiverse.com/thing:33001