“Noah’s eyes widen. He’d almost forgotten about presents. ‘Which one should I open first?’ It’s a small rectangular box. Noah pulls off the paper. ‘Whoa,’ he says, staring at the white box on the carpet. iPhone 7. He can’t believe it. His parents both have smartphones, so do a lot of kids at school. He’s so excited, he barely notices his grandparents get up to leave. ‘Oh,’ he says absentmindedly, ‘Bye.’”