Cut an inch off the length of the yellow color sheet as inner foam sheet. Save the extra piece, that will be your handle. Roll the inner piece into a cylinder, and overlap the edge. Secure with clothespins.
Fold purple color sheet used for outer – in half lengthwise. Now clip it closed with clothespins to help keep it folded. Leaving a 1? margin at the top, cut slits every inch across the folded side. You can use a ruler and pencil to measure and mark the lines, and then you can cut.
Wrap the outer foam piece around the inner foam piece. Secure along the top with brads spaced every few inches.
Balloon out the outer piece, match the bottom edges of the two pieces and secure around the bottom with brads. Then, attach the two pieces down the side with three brads.
Use your scrap piece of yellow foam to make a handle. Secure to the inside with brads. Now hang it up, and enjoy it all long!