We were advised to try EMDR the summer between K and 1st grade but were unable to find someone who did it with children so young. Instead we found an amazing psychotherapist (a 2E adult and parent of a 2E child) who was very successful addressing the PTS response through talk and play therapy. This psych used DD's high level comprehension - first developing an understanding of the physiological response, then addressing responses and triggers. All the while using the high level vocabulary and concepts DD needed to feel comfortable. IMO finding the right person to work with your child will be key no matter what approach they take.
Good luck!
