"I almost don't have words for how low it made me feel," says Melissa Henderson. When COVID-19 shut down her children's daycare in May of 2020, and Melissa Henderson had to go to work, she asked her 14-year-old daughter, Linley, to babysit the four younger siblings. Linley was engaged in remote learning when her youngest brother, four-year-old Thaddeus, spied his friend outside and went over to play with him. It was about 10 or 15 minutes before Linley realized he was missing. She guessed that he must be at his friend's house, and went to fetch him. In the meantime,...