NASA Kids provides instructions on how to build paper models of space fleet. Check it out at:

http://solarsystem.nasa.gov/kids/index.cfm?Filename=papermodels

On a related note, if you’re interested in building a paper model (or other types) of Hubble space telescope, you will find  this following link useful:

http://hubblesite.org/the_telescope/hand-held_hubble/