Publisher's blurb: A deck of 40 blank A.C.E! ID cards, in four colors (10 each of green, blue, yellow, and black-and-white). These are glossy cards. These cards can be written on permanently with a biro or ball-point pen, or non-permanently with wet or dry-erase markers. They can't be written on with a pencil. For use with the Awfully Cheerful Engine!