The first time Steffany Stoeffler joined the Happy Hollow summer camp a few years ago, she asked one of the kids what he'd learned. The boy's response surprised Stoeffler: "I didn't know," he said, ...

Credit: Credit: Zain bin Awais/Lifehacker composite; Oscar Wong/Boy_Anupong/via Getty Images Here's your guide to making the most of the sunny season, whether that means embarking on epic adventures ...