For anime fanboys and fangirls here's the Tetsujin papercrafts based on the classic anime Tetsujin 28 (known in the U.S. as Gigantor). You can download three models on their official below:
Tetsujin (Original)
Tetsujin 28
Black Ox
Tetsujin Papercraft / Gigantor Papercraft [tetsujin28.jp]