If you like him, just say it out loud. Boys on the basketball team should be admired by everyone. You want him to notice you. As for giving him gifts, here are some suggestions:
First, you can give him some basketball equipment, such as wristbands, which are the most commonly used items. Giving him one also means companionship. If he can wear it, maybe he likes you.
Second, give him a creative gift. Make a real-life doll of him and give it to him. It can also express your feelings well. You can even give him a small teddy bear. Although he is a boy, he will understand the meaning of such a gift.
Third, give some suggestive gifts, such as scarves, lighters and other small gifts. I think he will also understand what you mean and will give you a reply soon.