We write about hundreds of products a week. Here, in our version of the Sunday circular, we’ve plucked out some of our favorites — expert-recommended essentials, life-changing stuff you didn’t know you needed, newly launched gizmos, and the very good deals we uncovered while trolling through the vast online-shopping universe this past week, including an easy-to-use (and budget-friendly) streaming device, mineral sunscreen for mature skin, and the park cart that’s fit for a party.