I had a dream that I got a tattoo. But instead of using ink, they used carbon nanotubes and just tattooed a big square of it into my arm. They were clear, so it didn’t look like I had a tattoo. But I had a device that looked like a label maker. I could load an image onto it and then wave it near the tattoo and it would change the image on the tattoo. So I could have whatever tattoo I wanted at any given time, or none at all!