The train is coated in metallic silver. It comes flat and then folds into 3D to sit on a table. It's one of my favorites I've ever designed for them. I'm laughing right now just looking at it.
You can't really tell from the picture but the windows in the PEACE card that appear silver are actually diecut holes. The word PEACE is printed in metallic on the inside and is shining through the diecut windows.