Instructions
Lift your dominant hand so that your fingers point upwards. Hold the fingers together until they feel strained. Do the exact same thing with the opposite hand.
Place the pinkie finger of your dominant hand on the pointer finger of your non-dominant hand. This will make an intersecting line if looked at from above.
Wrap the thumb of your dominant hand over the thumb of your non-dominant hand and press your palms together. When your hands are in this position you shouldn't get any air in them.
Make a small gap by opening your thumb slightly. It should be about a 1/2-inch in width and shifted slightly towards your don-dominant hand. If the gap is too large you will not be able to make a pigeon sound.
Lay your lip on top of your thumb. Narrow the gap a little more and blow downwards to make a pigeon sound. It will take several attempts to accomplish an actual pigeon sound.