I draw a turtle on a whiteboard and tell the story of Twyla Turtle. “What should Twyla do today?” I ask my 2 ½-year-old granddaughter during our FaceTime call.  She has been home for a week after nearly 2 months of sheltering in place with her parents, baby brother, my husband, and me. Now my house is clean and calm. And empty without two little people that round out the ones I love most.  “Twyla wants to go to the zoo,” she says. I glance at her face up close in my phone and feel a surge of love. Then at her request, I draw a zookeeper, her baby brother,…