Materials: a balloon and an air pump.
The tulip twist has its name for the resemblance with the flower. Inflate a balloon with a two—inch bubble and long flat tail (Pic 1).
Form a ring with the thumb and the index finger of your left hand. Put the balloon inside of the ring (Pic 2).
Put the index finger of your right hand to the nozzle of the balloon (Pic 3). This is point A on the scheme.
Push the knot inside of the bubble with your right index finger until it touches the other end (Point B on the scheme) of the bubble (Pic 4 and 5).
Hold the bubble with the thumb and the index finger of the right hand (the index finger is inside of the bubble). Your left hand is free (Pic 6).
Grab the nozzle of the balloon (the nozzle is inside of the bubble now) and the base of the tail (Point B on the scheme) with your left hand. Twist the flat tail with the nozzle together (Pic 7).
Pull your right index finger slightly out of the bubble. It will bring the tail of the balloon inside of the bubble. You may release the tail from your left hand and the bubble will stay on your right index finger (Pic 8). This step is marked with arrows between points A and B on the scheme.
The air pressure inside of the bubble pushes the wall of the bubble against your finger and the twist. The air pressure holds the twist you have made and the bubble on your finger. Hold the bubble in your left hand and gently pull your right index finger out of the bubble (Pic 9 and 10). If you choose to hold the tail of the balloon and pull out the right index finger at the same time it will be harder, almost impossible to make it at all.