Cut the tissue paper into a 10 inch by 10 inch square. Crumple up a piece of plain white tissue paper into a ball that's about 2 inches in diameter.
Place the paper ball in front of a small paper cup, and then position it in the center of the tissue paper square facing one of the corners. Take the corner facing the paper ball and cup and wrap it over, tucking the extra tissue into the cup.
Fold in the corners to the left and right of the bootie, tucking in the extra tissue in the paper cup. Fold the back corner of the tissue into the bootie, tucking in the extra tissue in the cup. The bootie should be completely wrapped in tissue now.
Place another paper cup in the cup of the bootie. Press down to lock in the tissue paper on the inside, and then remove the cup. Tie a ribbon beneath the rim of the paper cup, just above the paper ball. The ribbon keeps the paper from coming undone and also doubles as the shoelace for the bootie.
For rubber sidewalls, cut a 1/2-inch strip of plain white paper and wrap it around the bottom of the bootie. Use a glue stick to adhere it. Cut a half circle out of the white paper that's about 2 inches in diameter. Attach the half circle to the front of the bootie with a glue stick. Now the bootie has a rubber cap toe. Yes, this baby's going to be on the go!