Three things to know: 

It can be difficult to know what people are thinking. So how can we unearth our real selves? Google, says Seth Stephens-Davidowitz.

 Older Americans have the AARP. Gun owners have the NRA. And now, kids have Common Sense Media.

 What can a couple of inkblots say about you? Apparently, a lot. We talk with Damion Searls about the rise of the Rorschach test.