A guide for when and how to give your kid a smartphone. Heather Kelly polled the experts, and there’s a lot we can all learn from their advice – whether we have kids or not. Plus, we dive into the reported benefits of “brown noise.”Read more:A guide to giving your child their first phone. Children are getting smartphones younger than ever. Make sure you’re all prepared.Even older adults struggle with screen time. Here's how to help them put down their phones and be more present.Listening to “brown noise” has become a popular solution for people who have trouble focusing, and in particular for people who have ADHD. Disability reporter Amanda Morris explains what this soothing sound is and why it helps. The Post is running a Black Friday all-access digital subscription deal. For just $0.99 for four weeks, that will cover you for your first 12 weeks. You’ll get our groundbreaking interactive stories, the most in-depth breaking news, our fantastic Well+Being and Climate coverage and so much more.