3D-Printed Birdhouse, A Sign

Note: there is now an improved 3rd version of this thing at: http://www.thingiverse.com/thing:117929

This rather large birdhouse is the entry/donation from my daughter and me to the 12th annual Birdhouse Display and Benefit Auction at The Arboretum in Lexington, KY. My daughter had the idea of making it look like a road sign with pictographs for bird and house -- with the entrance in the house pictograph. We call it "A Sign." And it is a sign in another way too -- it is a sign that 3D printin