Testing, Testing A series where we methodologically and obsessively try new products to tell you if they’re worth it so you don’t have to do all that work yourself. Read more reviews here . Photo: Youngna Park As a parent of newly minted third- and fifth-graders who has worked in children’s technology and media for 20 years, I’ve watched as the conversation around smart devices has become ubiquitous on the playground and in group chats. What’s the right age to get one? How does one balance