I am very sorry to hear about your dads situation....you will have our thoughts and prayers for him and his recovery. Best thing to do is keep him active doing things he seems to like. I was in a very bad car accident and even though I have always built models they are great therapy. Start him off on more simple kits and work your way up...there are many tools,etc. that could help him build I make some of the ones i use--painting stand from a wood block and metal coat hanger,etc. You just need to figure out what he has problems doing on his own and find the answer to them together. Plastic clamps,tooth picks,emery boards,long tweezers,etc. will help him build. Hope this helps some? Just don't give up...together you can figure out it all.