The work directed toward increasing the child’s ability to tolerate and regulate affect, so that the processing of traumatic material can be achieved, is initiated during the preparation phase. The process of providing the neural stimulation to improve the child’s capacity to bond, regulate, explore, and play should begin during the early phases of eye movement desensitization and reprocessing (EMDR) therapy. The Polyvagal theory presents a hierarchical model of the autonomic system. In complexly traumatized children, the development of this system has been compromised due to the early dysregulated and traumatizing interactions with their environments and caregivers. When describing the various forms of bilateral stimulation (BLS), go over the different options and practice with the child. If the child went through the calm-safe place protocol successfully, motivating the child to actually use it when facing environmental triggers is an important goal.