Relaxation and tension belong together. A pair of complimentary opposites. Relaxation without tension is flaccid, dispersed and collapsed. Tension without relaxation is rigid, frozen and brittle. They inform each other and balance each other. They work together, and this work we call play. Play expends energy but also generates energy. At its best, play is elastic and ecstatic. Together and connected yet flexible and free – unpredictable.