For Shelley with the nephew who has meltdowns…noise canceling headphones (https://smile.amazon.com/gp/product/B00HVCKQ04/ref=ppx_yo_dt_b_asin_title_o05__o00_s00?ie=UTF8&psc=1) helps my nonverbal, sensory- sensitive daughter cope with the world. Love to you and your sister and nephew. It’s a tough road but you are not alone.