Ella isn’t like other little girls. She’s inquisitive and curious, with a heart that senses others’ emotions with the precision of Doppler radar. She drops coins from her piggy bank into the outstretched hands of the homeless in Times Square, frets over the plight of hurt animals on the roadside, and two Christmases ago, organized a coat drive at her school when she saw a little boy shivering on the playground.