GNK power droids (aka Gonk Droids) are walking power generators from the Star Wars universe, it got its name from the "gonk" sound that it makes.
Star Wars - GNK Power Droid Papercraft [Download]
Star Wars - Lightsaber Papercraft [Related Posts]
Stormtrooper Papercraft Helmet
R2-D2 Papercraft Mailbox
TRON Legacy Light Cycle Papercraft - Photos
Official TRON Legacy Papercraft