A few months ago we were on a beach at night, before we left Hawaii. I showed DD6 the ocean, the city skyline, the trees blowing in the wind on the sand, and the stars. I asked her which was her favorite, She paused a second and said that the buildings (skyline) were her favorite. I asked her why, or how she was able to answer so quickly. She replied that in her mind, she associated the buildings with a bright green line, and the other views had shorter lines, that weren't as bright, or were different colors. So, she knew that she preferred the skyline.
Since then, there have been several times where she has described similar things. She and I had visited two different churches, and I asked her which one she liked better. She pondered for a moment, then picked one, explaining how it showed up differently in her mind (a rising green line vs a flat red line, I think).
Then tonight, she mentioned three songs she likes, and that in her mind Song A has a fat pink line, Song B has a medium brown line, and Song C has a thin brownish-gray line.
Has anyone else heard anything like this before? My Google skills are not having any success.