To apply this to Primary Music Time, the idea of this is that sometimes you need a "brain break" to get your brain ready for learning (or, in the middle of a lesson, to realign your brain so it can get back to learning). It's basically some simple movements that cross the midline of your body and therefore, also the midline your brain. It's a repeated exercise where one hand touches something on the other side of the body - then the other hand does the same thing on the other side of the body. One side, then the other, then repeat. IE: stand up, touch right foot with left hand, stand up, touch left foot with right hand. Repeat a few times.