This is a DVD set from Kodomo Challenge and Challenge Touch. Includes DVDs for 1st and 2nd grade. Also includes a trial version that came with promotional flyers. Since there are no cases, I will include a Kodomo Challenge DVD case. There are also DVDs from Happy Meal. I checked the DVDs on a DVD player and they played without issue at the beginning, but I haven't checked the entire length. These are used items and may have minor scratches. The trial versions may have overlapping content. Some of the tablet version DVDs may be based on the educational materials, so if you'd like to try them out, please consider purchasing. Please refrain from purchasing if you are looking for a perfect item, as these are used.