Making the balloondog
Inflate a 260 balloon and leave about 7 fingers uninflated in the tail end.
As you twist the balloon into a balloondog, some air will get squeezed into this uninflated part of the balloon.
Otherwise the balloon claps.
Squeeze both portions of the folded balloon about 2 inches from the fold. Then twist the balloon in a circular motion where you squeezed it. The twist will hold together once you rotate the twist 2 or 3 times.
Now that you've completed your first attempt, try again with another balloon. Your scultpures will get better with practice. You can try variations like adding individual twists between the ears and legs, or varying the lengths of bubbles. You can see also the balloondog in video on this page.
If you look carefully, you'll see that you just made the ears of the dog (the short end with the knot and nozzle has become the nose ). The front and back legs are made the same way as the ears. Fold the balloon an inch below the twist that formed the ears, then twist the balloon in a circular motion (forming the front legs). Finally, fold the balloon 2 inches away from the twist that formed the front legs, then twist the balloon in a circular motion.