Father’s Day gifts ideas that are no more than $30?

I want to get him something but do not have much to spend. Our girls are 4 years old and 1. He plays call of duty and fortnite on a Xbox one, currently rebuilding a engine of a Nissan Xtraa, works on a computer from home 45 hours a week, likes togo fishing but doesn’t make a lot of time for it anymore and doesn’t drink.