Doing an activity independently and being successful feels good to everyone! This downloadable activity is an activity where the learner can be independently successful completing an activity. It also helps teach identical matching and the initial concept of group sorting- taking an identical item from a group of identical items and moving it to match an identical item. There is an added bonus of non-identical cards to teach grouping of non-identical items. The pictures are large and clear. Great for those with vision issues or even visual attention issues. It is a starter activity/book but my son still pulls it out when he needs an activity where he can be quick and idependently successful.