StormFly may sound like an insect species – or to fans of How to Train Your Dragon, a mythical reptile – but it’s actually a new bootable USB device that comes in the form of a bracelet.

At its core, the $59 StormFly is little more than a 16GB USB 3.0 flash drive with a bootable version of Ubuntu that someone (ideally a kid) can wear on their wrist. After a little bit of setup ...