The key to giving gifts to children is to make them happy, so you should give them gifts they like, or gifts that are educational, or gifts that can develop intelligence, exercise hands-on skills, etc. See if there are any gifts he likes below.
1. Children still like to eat when they are in elementary school. You can buy him a big bag of snacks, or buy him a big cake on his birthday, and light candles with him to wish him a happy birthday.
2. If your younger brother likes anime, you can give him anime-related gifts, such as an anime puzzle, a digital oil painting, or a plush toy of a cartoon character, or a big bear.
3. You can also buy an ornament for your younger brother, inlay their family photos, and put it in his own room, which is also very warm and beautiful.