A revolutionary pen that draws in any color (pre-launch)

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I think this is what magic looks like
Makes me a little suspicious that in that ~3 min video, the demo showing any kind of prototype working was about 3 seconds long (1:27-1:30) and didn't really seem to show much. Working on an iPad I can wrap my head around, but working on paper seems like a real feat. Them not showing it more in the video makes me think they could be hiding something or haven't figured it out yet. I hope it comes through though, b/c the concept seems awesome.