This powerpoint shows two objects, one is "empty" and one is "full." So this is perfect for your preschool students working on quantity concepts. You can work on this receptively (i.e. "touch empty"). Or you can target this expressively. It also has a sentence strip (visual) to help your students make a sentence (i.e. "The cup is ----"). This can be used 1-1 or for a classroom lesson.