Educationalists have long been aware that the brain of the child possesses
an unique capacity for assimilation of novel skills which vastly outshines
that of the more chronologically endowed. However, devotees of our beloved
game have hitherto been challenged when introducing their progeny to the
delicate strategems of this beguiling pastime by a compendium of competing
diversions (examples include draughts, chess, Snakes & Ladders and the
perennially popular Grand Theft Auto). Now, AT LAST, from the Corporation
which has perhaps worked harder than any other to elevate our game from
popular cult to the esoteric elitism it rightfully deserves, comes a version
of Mornington Crescent to introduce infants to the rudiments of the game....

http://www.bbc.co.uk/cbeebies/funandgames/undergroundernie/trackthetrain_full.shtml