A Steam Powered Christmas at Peter's Railway

Christopher Vine’s series of 20 books tell the story of Peter and Grandpa building and operating a railway across their farm. The Peter's Railway bookshop is here: petersrailway.... “Combining real engineering with adventures and true stories, these books feed inquisitive young minds!”
In this video Chris Vine is having a Steam-Powered Christmas with a small steam engine: But what is it powering?...
Bongo (or Fiery Fox in the books) is the miniature steam locomotive, made by Chris Vine, Author of the Peter's Railway series of books.