Your nephew is eight years old. He is active and lively. His body and intelligence are both in the growth stage. The gifts you give him can also be selected from these two aspects. For example, you can give him a children's basketball, roller skates, etc. For intelligence, you can make the following choices.
1. Give him a children's puzzle. Montessori, a famous educator, said: If you let your child concentrate on one thing for half an hour every day, the habit cultivated in this way will benefit the child for life. Jigsaw puzzles happen to meet the wishes of many parents. He can find himself, his family, and a familiar environment from them, thereby effectively increasing the child's interest in playing puzzles.
2. Give him a step-by-step reading machine. Learning is fun, and learning knowledge while playing is very good. Moreover, this gift will make your sister feel that you value your nephew very much, and your sister will be very happy. I hope my suggestions are helpful to you.