Collection of die-cast metal push-along train engines featuring Thomas and Friends characters, which change color when immersed in water! ​Includes 1 die-cast engine. Each sold separately and subject to availability. ​2 engines in 1! Kids can dunk the engine in either warm or icy cold water to reveal a different color deco on the character ​​ ​These push-along train engines are compatible with any Thomas and Friends track (Track sets sold separately and subject to availability.) ​ ​Helps strengthen fine motor skills and encourages imaginative storytelling play for preschool kids ages 3 years and older ​ Young conductors can recreate their favorite railway stories from the Thomas and Friends: All Engines Go! series with these die-cast metal push-along toy train engines with awesome color-changing action! Kids can collect their favorite characters from the series and watch as the engines change color when placed in water. It's like having 2 engines in 1! Reveal hidden decorations on each engine by changing the water temperature from warm to icy cold (and back again). Each engine sold separately and subject to availability.  ​​