Canon has an awesome collection of 3D Papercraft, miniature models in their site which can be found here: http://cp.c-ij.com/english/3D-papercraft/index.html
To give you an overview of paper crafts they have:
+ Dump Trucks with moving parts, various Sailships (Sagres II, Akogare, Nippon Maru, Viking Craft) and new Wright Flyer
+ Buildings of the world from Notre-Dame de Paris in France to new paper craft Shuri Castle in Japan;
+ Ornaments such as Easter Bunny Egg Holder, Christmas Tree with Ornaments and Halloween Tree
paper model difficulty: varies for each model
enjoy printing and crafting.