I decided to make one of each. Circle and square, but I most definitely like the circle more than the square. I guess the scalloped edge adds a little something extra. Next time I think I will try adding a scalloped edge to the square!
Using the scrap rubber from my wood mounted stamps, I cut strips and outline the shape of my cutout to make the wall for the beads in order to turn this into a shaker card. Add whatever assortment of beads into the wall you have made. (I used both beads from the red bead duo.)Peel the tape back and add a layer of window sheet to contain the beads. Finally adhere the top layers of your card and shake it baby!