Lionel Trains Frosty the Snowman LionChief Remote Set Frosty the Snowman 0-8-0 Locomotive, Coal tender, Hocus Pokus Coal Co. 2-Bay Hopper, Traffic Cops Cake Shoppe Reefer, Caboose 8 - Curved O36 FasTrack track sections 3 - 10" Straight FasTrack sections 1 - 10" FasTrack terminal section LionChief remote controller. the locomotive and the tender have to be connected for the sound to work. The sounds come from the tender. So the locomotive cannot run by itself if they are wanting sound.