It's a male friend's birthday. I don't know if it's the boy you like. If so, you can give him some special gifts, such as buying a pair of agate bracelets for couples, engraving their names on them, giving him the men's bracelet, and waiting for him to find the other women's bracelet on your hand that matches his bracelet. When he sees it, he will understand your intentions, and agate can also bring happiness and good luck.
Give him some fashionable digital products, such as P3, P4, digital cameras. Boys will like these things. DV is also good. You can record some daily life clips. If you really want to, you can also record some words you want to say to him in it and give it to him.
Of course, if you are just ordinary friends, then the gifts recommended above will also be a very good birthday gift if given alone.