Over a decade ago, my brother gave me a tiny instructional book on the surya namaskara, or sun salute.  I immediately incorporated it into my practice, eventually teaching it to my five children, and my students.  
Kids appreciate it because it gives them the most bang for their buck.  Mentally and physically, they feel as though they've crammed for an exam, one which guarantees them an 'A' for the rest of the day.  Adults often practice because it's easy to find the time!
Yoga derives originally from the Sanskrit word for yoke.  And we want to yoke everyone with a simple daily life salute.
It is a series of movements which can be practiced anytime, anywhere, in less than two minutes a day.  But the best thing about sharing a life salute is its absolute universality. ANYONE can practice.  Even those who are paralyzed can benefit from just running it mentally.  Each to his own ability. Its for the old and young, rich and poor, monk and atheist, republican and democrat, each of us, to practice together.   A life salute tunes the brain to a connectedness that even other sports do not enable.  All religions (and non believers) can agree on this natural prayer.  Its the ultimate hook up. Beyond water, food and shelter (and we don't even all agree on that) there is one experience which can connect us all. A life salute, daily, every single human being; a thread of conscious connection.