There are countless mindful breathing techniques, but the main component of all of them is focusing your attention on the sensations in your body as you breathe, such as your belly and chest expanding as you inhale, or the air coming through your nostrils. Each time attention wanders, bring it back to the breath. Counting down (“Five, I am breathing in, five I am breathing out, four I am breathing in and so on) as you breathe can sometimes help maintain focus.
Teaching these techniques can help children be more resilient in the face of whatever stresses they face and will help them learn to think in a way that creates less stress for themselves.