Materials: a balloon; an air pump; sewing thread and scissors.
Inflate a balloon leaving a four—inch flat tail (Pic 1).
Twist the first sixteen—inch bubble (Pic 2).
Twist the second soft one—inch bubble (Pic 3).
Lock both ends of the 2nd bubble in one lock twist (Pic 4). This step is marked with arrows between points B and C on the scheme.
Lock both ends of the first bubble in one lock twist (Pic 5). This step is marked with arrows between points A and B on the scheme. The rest of the balloon is the third bubble.
Cut off the third bubble and tie off the end (Pic 6). Congratulations, you have made the letter O or the digit 0. Choose appropriate color sewing thread to link the letter O with other letters. As you can see here the light color thread is hardly visible on a light background. After you made and connected all letters in words you can attach the signs you made to a wall with a sticky tape. Have fun and happy twisting :)