We bought the whole Ites set not knowing much about these, so I thought I'd leave some input for the next person. We haven't used the cards in a way that has made them vital, but they are an attractive looking hands-on. For the most part, they have been looked through a few times and put aside, but then again, we are only a couple months in studying the book (one lesson a week), so they aren't able to be used for much review yet. I still rate them high because I think someone could use them well as flashcards or for a game, and they are made well. They have facts about the "character" on the back, and a picture on the front, and are a colorful smooth glossy cardstock. They are similar to playing cards in size.