umm maybe something cute like a handmade card with a letter explaining why you love him and something you know he loves, like some of his fave foods or movies that he doesnt have.
or a really cute idea is the coupons you can make like ‘valid for one back massage’ or ‘2 free car washes’ something really personal.
you dont need to spend heaps of money of your guy to prove that you care about him and that you enjoy being with him. :)