Well, if we assume 'bj' is a place, here's a story. The naive little daughter, Amy, lived in a small town. One day, she heard about a wonderful event happening in bj. She was so excited that she begged her parents to take her there. Her parents finally agreed. When they arrived in bj, Amy was amazed by all the new things she saw. She made new friends and learned about different cultures. It was a great adventure for her and she grew up a bit more worldly after that experience.
Once upon a time in Beijing, there was a naive little sister named Lily. She was always full of curiosity. One day, she went to the Forbidden City. She was amazed by the grand palaces and the long history behind them. She asked every guard she met about the stories of the emperors who once lived there. Her naivete made everyone she interacted with smile.
Once upon a time, there was an innocent little sister named Lily. She was always full of curiosity. One day, she found a little injured bird in the garden. She carefully picked it up and took it home. Then she spent the whole day looking after it, feeding it and making a cozy little nest for it. Eventually, the bird got better and flew away. Lily was so happy to see it go back to nature.
There's really not enough information in the title 'little sister empties balls bj story' to accurately determine what the story is about. It could be part of a creative writing exercise where the words have a very unique and personal meaning to the author. It might also be a mis - named or mis - remembered story title. Without further details, we can only wonder what it could be.
The naive little sister in Beijing might have an exciting experience. For example, she could be excited to try the local street food like jianbing. She would look at the vendor with wide - eyed wonder as he made the delicious pancake - like food right in front of her. She might be a bit hesitant at first to take that first bite but once she did, she would be delighted.
Since the 'bj' in your title seems out of place and not clear in relation to the 'little sister swallows seed' part, I'll focus on the main part. It could be that the little sister swallowing the seed is a key event in a story about a family. Maybe it causes worry among her family members, and they have to figure out what to do, like whether to take her to a doctor or wait to see if it passes naturally.
If this is a non - inappropriate story, perhaps the 'trick' could be a misunderstanding. For example, the little sister might be tricked into believing she's going to a fun party but ends up at a boring family gathering. It could be about how she overcomes the disappointment and finds something positive in the situation.