This reply was originally posted by user Peacfldove in ADDitude’s now-retired community.
Acting as his scribe is a good idea. You might also consider having him evaluated for dysgraphia and or other learning disabilities that might be affecting his ability to get the thoughts to paper. He sounds a lot like my son who was eventually diagnosed with dyslexic dysgraphia. The sooner they start working on keyboard instead of handwriting the better. Also try text-to-speech dictation software so he can just talk and not worry about the writing. He can go back and edit after all the ideas are captured. Good luck.