Your girlfriend's younger brother is your future brother-in-law. You must behave well on his birthday, because this will please two people, one is your future mother-in-law and the other is your fianc閑.
1. Boys of this age are quite individualistic. Why not give him a tungsten personalized military badge with his name or constellation engraved on it? He will feel proud in front of his classmates when he wears it.
2. Buying a pure titanium health necklace is also a good choice. It contains a variety of trace elements that are beneficial to the body. Boys will definitely like it.
You can buy him an MP4 or something like that. Boys are still interested in electronic products. It is best to buy a big brand with better sound quality.