Thomas & Friends minis SCRUFF! ALL 3 GLOW IN THE DARK SLIMY CARGO SURPRISE NEW! Thomas, Scruff, and Salty glow in the dark engines. Packages also include a glow in the dark cargo crate full of slime, and a glow in the dark surprise figure. As the mother of a 4 year old boy, I can tell you that kids love these surprise toys. It creates ultimate anticipation not knowing what they will get! And speaking from experience, the slime is also a huge bonus. They love the stuff! These will make a great gift for any kid 3 and older!