It started in preschool for Gracie. She and her classmates were coloring with markers. The crinkling of the paper and the squeak of the markers made Gracie so tired that she put her head on the table ...

What do the sounds of whispered affirmations, page-turning, and tapping fingernails have in common? What about the sight of slow hand movements, soap being gently cut to pieces, and hair being brushed ...