Thomas is heading underground for a mining adventure in the Thomas & Friends™ TrackMaster™ Glowing Mine Set from Fisher-Price! Children can send him around this glow-in-the-dark train set, and help him mine for gems. As motorized Thomas makes his way around the rails, he'll race over, under, and through a collection of glowing caves and tunnels. Kids can stop him at the cargo loader and dump the barrel into his cargo car, or park him in front of the boulder, where a cluster of glowing gems is waiting to be discovered! The No. 1 blue engine proves he's not afraid of the dark as he finds valuable, glowing cargo while racing through a hidden network of tunnels and caves!