craft

I have a grandson who will be a high school senior this coming fall. His school colors are gray and maroon. School mascot is a cardinal. His favorite colors are green, white and blue. The only sport that he likes is auto racing. He loves electronics and technology.He has been working in a greenhouse during the summer. I would some how like to tie of these things together in a graduation quilt for him.

I am open to any advice and ideas that you all can give me. Also, what would be the right size quilt to make for him. My grandson is over 6ft tall.