Transform a lawn chair into a throne that literally puts within his reach everything he needs to be king for a day.
Add items like: clip-on fan, back scratcher, plastic snap-on cup holders, newpaper, foot soaking tub, travel pillow, beaded driver's seat cover, mini pool table or basketball hoop, red carpet (towel), or slippers.
Use tape, clamps, or string to attach appropriate accessories, from a shade umbrella to a back scratcher to a cold drink holder.
Fashion a halo made of wire to hold Dad's favorite hat or crown and attach it to the back of the chair.
Include a bell for Dad to ring for service.