The Thomas Train Set Trackmaster Glowing Mine Glow In The Dark Replacement Pieces are original, battery-powered plastic pieces designed for the Thomas & Friends TrackMaster set. Featuring elements from the "GLOW" TV show, these pieces add an exciting glow-in-the-dark feature to your train collection. Produced by Fisher-Price, these pieces are part of the popular Thomas & Friends franchise and are a perfect addition to any action figure toy collection. Perfect for fans of the show or collectors looking to enhance their track set with a unique and vibrant touch.