Fisher-Price Thomas & Friends TrackMaster, Tunnel Expansion Pack Includes straight and curved track pieces with directional switches and tunnel Connects to other TrackMaster playsets, track packs and expansion packs (sold separately) Includes 2 track adaptors, designed so you can connect the new TrackMaster track to the previous model The Tunnel Expansion Pack lets you create a bigger, more exciting motorized railway Perfect addition to your expandable, connectable, motorized Thomas & Friends TrackMaster world