In this set, there are 125 images on twenty five 4x6 cards. Each card contains 4 images that start with the same initial sound. After you prepare the materials, the child has to sort the photos based on their initial sounds. This material is not used one time for one child. Once you prepare the material, they will stay in the classroom and will be used for many years to come. So, I recommend laminating the cards.
I have not color coded the letters into groups because of a good reason. The grouping of the letters could be different from one training to another. I wanted to keep the option open for you to do the grouping based on what you do in your classroom.