What to get for my (male) friends birthday?

He likes swimming and math mostly. I can’t think of something personal and not too expensive that he’d enjoy.

If not personal to his interests, what are always good go-to gifts for guys?

linkus862019-08-06T17:59:00Z

Bake him some cookies.
funny T-shirt/hat/coffee cup
DVD/video game

SW-62019-08-06T17:30:08Z

I would go with the easiest way to assure he gets something good that he can really use - a $25 gift card. Put it in a nice little box, get a Happy Birthday scratch off lottery ticket to put on the box and done.