more personalized gift. Don't the post-90s generation like non-mainstream things? I suggest you customize a gift for him, such as a real-life doll, made from a photo of a real person. The gift is more delicate, and you can choose different scenes. It is funny and realistic, so it should be more popular.
In fact, the child is in school now, so you can also give him some school supplies, such as stationery, electronic dictionaries, repeaters, etc., or you can also give him a book that you think is good to encourage the child's growth, which is also very good.
The post-90s generation is between 21 and 11 years old. Children of this age have begun to pay attention to their appearance. You can give him a piece of clothing, buy some sports clothes, which are the best. Children of this age should like it more. There are also ball games, which are also more popular. If you have enough funds and your cousin is more supportive, you can also give him a mobile phone. The child will definitely like it, but I am worried that it will affect his study.