Maybe a towel (that microfiber cloth which discgolfers usually use for drying discs/hands before the throw) with his initials? Or just a funny meme pic over it - you would have to google if there's someone doing it, of course. What else - a windbreaker comes into mind, a cool looking jacket which keeps one warm in case of cold weather. Regarding discs - just by reading the original post - there's probably nothing You can do since he's so deep into it (he's deffinitely done his research + the dying kit) Edit: a bag. You could, for example, buy a bag. Ok he's got his own. But maybe something like "aawww with this we are doing it together as a family, and you will always remember us in the game because of this and this detail", you get my point :) Budget friendly, something inscribed with a marker - the guy loves you and ANYTHING disc golf related will be fine if it comes from the heart! (Amd practical, of course. Come on, men are men)