The cenvention car kit offered at the 2006 NPRHA Convention in Bozeman, Montana on July 12-16, 2006.
Links to interesting modeling web sites with NP content. 
Narrated slide showing how the master modelers do thier tricks to achieve realistic models of the NP equipment and structures.
Descriptions and reviews of NP kits and other NP modeling projects.
A list of the manufacturers with models listed in the NP Model Kit list. 
Pictures of significant NP models.