This includes stimuli to help with teaching and practicing different ways to sort, including by color, shape, size, and class. All cards are the same size and format. They fit inside an index card holder box and the title card and target list can easily be placed on the top and inside of the index holder for ease of use and storage. Great for VB-MAPP, EDSM, or working on visual perception skills in schools as a "center" or independent activity!