One of the oldest things I still own, an early gift from my parents, is a blue Leatherman Mini-Tool. Growing up, I used it constantly for a strange mix of projects: taking apart simple gadgets, measuring fabric for sewing, and peeling (technically) edible bark off trees to practice wilderness survival, among other things. But I also always pined for a much more traditional pre-teen luxury: a charm bracelet. These weren’t as different as they seem; they were cute, shiny, modular windows into the world of adulthood. But apparently, if I’d grown up a decade or two later, I could have had both at the same time.