Preschool kids can recreate their favorite railway stories from the Thomas & Friends: All Engines Go!™ series with these diecast 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 toys in 1! Reveal hidden decorations on each toy by changing the water temperature from warm to icy cold (and back again).