I had the great privilege of running my own photography/Instagram stall at Facebook's first "Take your parents to work" day. I gave visitors pointers on photography, helped them understand the IG app, and edited a few pictures.
Questions ranged from, "What is Instagram?" to "Why don't I look nice in photos?" - as well as the ubiquitous, "How can I get more followers?" (which was my question). It was a lot of fun!