We've got three Kamen Rider papercrafts today from Maira's blog, these beasts are paper trains based on the Kamen Rider Den-O series. I haven't seen any shows of it in quite a long time and as far as I can remember, the last series that I watched was Kamen Rider Black. The trains are part of whats called as the DenLiner - a time travelling train in which the Kamen Rider uses to stop the bad guys from altering the past and future. Three papercraft trains, two of which I don't have any info. but the one with what looks like a dragon is head is called the King train or King Liner.
Also check out the video below showing the Tomy Plarail (plastic electric train set system) DenLiner which is quite popular with the kids in Japan.
Kamen Rider Papercraft - DenLiner [Maira's Blog]