Supplies: a balloon and an air pump.
Inflate a balloon leaving about 7 cm flat tail (pic 1).
The first bubble we twist to make the handle. It should be long enough for you to hold it comfortably with two hands. Twist the first about 20 cm long bubble (pic 2).
Twist the second soft about 2 - 3 cm bubble (Pic 3).
Lock both ends of the second bubble in one lock twist (pic 4).
Twist the third soft about 3 cm bubble (pic 5).
The loop of the next bubble should be large enough to firmly hold the handle - you will have to partially force the handle bubble through this loop. Twist the fourth about 17 cm long bubble (pic 6).
Lock both ends of the fourth bubble in one lock twist (pic 7).
Force the second bubble and part of the first bubble through the loop of the fourth bubble (pic 8 - 11).
The second bubble should protrude about 3 cm above the fourth bubble (pic 9).
Twist the fifth about 4 cm bubble (pic 12).
Twist the sixth bubble of the same length as the fourth bubble (pic 13).
Lock both ends of the sixth bubble in one lock twist.
Twist the seventh soft about 2 - 3 cm bubble (pic 15).
Lock both ends of the chain of the last five (the seventh through the third) bubbles in one lock twist (pic 16 - 17).
The rest of the balloon is the eighth bubble - it is the blade .
Force the eighth bubble (starting from the end of the balloon) through the loop of the sixth bubble (pic 18 - 22). You have to fix the fourth and the sixth bubbles as close to each other as possible. Congratulations! You have made one balloon lightsaber.
Rub the blade with your hand very quickly for about 10 seconds to charge it with static. And then you can use the lightsaber to show the force - it will stick to a wall (pic 23) or raise up long hair on someone head. Have fun and may the Force be with you :)