Infant learning and development is a field full of dubious theories, because there are so many desperate parents willing to try anything that might give their kids a slight edge-up in life. So the stage is set for Baby Yoga, aka "dynamic baby gymnastics," aka 'swinging your baby around your head.' Its practitioners claim that if you're not doing this, then you're depriving your child of an important developmental opportunity.
Check out the video below which shows Elena Fokina demonstrating some Baby Yoga moves. Warning: if the sight of kids being swung energetically around might disturb you, then you probably want to skip the video. Previous videos of Baby Yoga posted on youtube have been banned because they caused such an outcry. (See this BBC News story from Feb 2011).
Anticipating that this video might also get removed from youtube, here's a few screenshots of Elena in action.
According to the video, the practice of Baby Yoga originated in Russia -- its founder being Igor Borisovich Charkovsk, who also advocates the health benefits of dunking kids in water over and over again. More info: anorak.co.uk.
As one would expect, mainstream pediatricians warn that swinging your kid around like a rag doll could be very dangerous if you lose your grasp on the kid.