If you’re carrying around an exposed circuit board and a bunch of wires people are going to notice you. But a dry erase marker won’t turn any heads. And this one holds its own little secret.

You've definitely used dry-erase markers to mark up a whiteboard in a classroom or at the office—they’re so ubiquitous, ...

While most regular markers are water-based, making them easier to remove from clothing, dry erase markers can be a bit ...