It's my sister's 5th wedding anniversary. As a family member, you are of course a witness. So you shouldn't miss such a day. As a junior, you will be more flexible. Unlike your parents, you will represent the family's attitude. Give a simple gift to represent your wishes. Here are some suggestions:
1. You can go online to customize a real doll with your sister and brother-in-law's wedding photos. It's a very realistic doll with cartoon cuteness. It condenses the art of happiness. I think they will like it very much.
2. Give them couple's objects. Of course, it's not enough to give them rings. It's very good to give them a pair of couple letter chains. The letter chains with their names engraved on them can reflect the feelings between couples. It's also a good wedding anniversary gift.
3. You can also prepare a romantic trip for them, buy them a travel ticket, and take a trip for this wedding anniversary.