I have ADHD, and although it can make things difficult at times and I used to hate it,I'm not sure I would change things now. I've learned to see the positive side, and I think that's one of the most important aspects of successfully dealing with it. My dad knew I was struggling with it, and he bought me a book called Attention Deficit Disorder A Different Perception by Thom Hartmann. It has a lot of information and perspective that might help you. You said he's only 5, but I can tell you that it meant the world to me to have my parents support and assurance that it wasn't my fault. Good luck with everything.