Preschool kids can unbox hours of exciting railway play with these Thomas & Friends Colour Reveal & Surprise toy trains from Fisher-Price. Kids can unbox and dunk the mystery engine in warm water to reveal who it is! Then discover hidden decorations on the engine by changing the water temperature from warm to icy cold (and back again). Each engine also includes 2 cargo cars and 2 surprise cargo pieces for kids to unwrap, load up, and send racing around with the engine. Compatible with any Thomas & Friends track (Track sets sold separately & subject to availability.)