Yoga is one form of practise which includes breath control and specific body postures (asanas), that provides a range of physical, spiritual and mental relaxation.
It teaches children to be calm while gaining awareness of the bodies, self-control and discipline.
The following article Yoga Asanas For Children provides the names, photos and the benefits of easy yoga asanas that will benefit children and help them to remain healthy.
To read the article, click the link: Yoga Asanas For Children