These are flashcard-type manipulatives that can be laid on the floor to create full circles (we call them pizzas in class) to form 4/4 or 6/8 measures. I print them on colored cardstock and the kids use them unlaminated with no problems. I have included all 8 sets that coincide with the sets and sequence of rhythms that I teach throughout the year and throughout the grade levels. Mostly, my kids use them for small-group composition activities, but they could be used for rhythm completion games, or where ever your imagination takes you! They do not actually have any "pizza" graphics, which keeps my kids from getting distracted by food!