15-year-old girl is in adolescence and she attaches great importance to birthdays. As her cousin, you must buy her a gift she likes.
1. Buy her a large-sized Lin Jiaxin bear. Every girl likes this kind of toys, and I believe your cousin is no exception.
2. Buy her a creative luminous pillow. It can glow when the power is turned on. She must like this novel gift very much.
My cousin is still in school, so it is more appropriate to buy her a pair of branded sports shoes. Students still wear sports shoes more often.