Thank you to everyone for your replies. It has been so helpful!

Over the weekend we brought up casually at dinner with my DS and DD to tell us about Percy. What did they know about him? Left-handed, etc. My DS7 said he was dsylexic and had ADHD. We talked about what that meant for Percy. I asked if it was good or bad or both. He said both. We didn't go any farther just then, but it has opened a door for us to talk with him. While my DS does not have the apparent reading challenges Percy has, I think we can use Percy as an example to help him understand what dyslexia means for my DS and how it can be BOTH good and bad. This is going to make it so much easier to have this conversation with him.

Thank you!