Christmas morning started early with an invasion of two kids, who acted more like they were preschoolers than grade schoolers. Even level-headed Lee was jumping around like she’d never celebrated the holiday in her life. “Mom! Mom! Look, a watch!” She was staring down into the slim box that she’d taken out of her Christmas stocking. “Dude! A Go Fit!” Mack, now with a fit leg, was holding up what looked like another watch. Him having a piece of hardware to give him stats on his fitness level was a misuse of technology if I’d ever seen one. Even laid up, he was more fit than anyone else in the room. Still, if he was happy, I was happy. We’d decided to have Christmas morning and the unwrapping of the presents at my house to save Charlie the walk across the street at the coldest part of th

