Useful links:
Snapshot 16w20a: [Wiki Page] [Mojang Page]
Bone Block: [Wiki Page]
Other search terms: Mini Bones Block - Mini Nether (probably) - Mini Structure - 1.10
How to Print?
1.Click on the papercraft design image.
2.Make sure it has not been resized by your browser (you might need to click the image again).
3.Print using your browser's Print function.