As a docent, I'd be thrilled that a kid was so engrossed in the exhibit that he didn't notice me. The point of the place is the exhibit, not the docent.
This this this this this!
If I'm in a museum, I'm probably either engrossed in looking at the items or reading the explanation of the items. I'd actually hope that a docent would be quiet and let people contemplate the items unless approached with a question, or unless it's a guided tour where a live person explaining the items is part of the content.
Yes, esp when the exhibit had to do with his favorite president.

It can take my boys hours to go through one exhibit. They want to read everything. Me, I can take a second or two to look at it and move on. This is why it's best when my DH goes along. I can head to the coffee shop while they absorb everything. Ha!
WillyNilly, no problem...no rankles up here. I just wanted to be sure and describe the situation as close as to how it happened 'cause I know sometimes on eHell things or descriptions tend to take on a life of their own and I wanted to be sure and keep it to my situation as much as possible.
I have talked to him about phrasing but I think it might be time to have a 'refresher' course. Thank you to all who gave advice and possible phrasing. I am going to use them.
My father is visiting from out of state this week and my son was pretty quiet with him the first two days but now...he's been pretty chatty (not like him) and pretty hyper (again, not like him). But even with his own grandfather, it took him a couple of days to get comfortable. Sometimes, it's so hard for me to understand his personality because I'm the complete opposite. I love being in a group of people and chatting. Could do it for hours. DH and DS, otoh, aren't wired that way.
Only now, am I starting to really appreciate my son's personality. He's so unique, creative, smart and oh so funny! I just wish others had an opportunity to see that side of him, instead of only the quiet, reserved kid.