LEGO Trains Value Packs, also called Bonus Packs, are bundles that contain several LEGO sets in one offer. Typically, these contained sets are not available in retail with the main selling points of Value Packs is the inclusion of an exclusive model and a lower price when compared to individual purchases of the same sets.
LEGO Trains is one of the longer running themes that dates back from 1966 and ran up until 2006. During its run there were multiple sets released running on various power platforms from 4.5volt, to 9 and 12 volt sets. Later in 2011 LEGO released additional train sets using RC and Power Functions controllers under different themes like City.