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.
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.
It depends on how it's done. If it's just a simple pretend game where no one is made to feel uncomfortable and it's all very innocent, like just using a toy stethoscope to 'check' for pretend illnesses, it might be okay. But in general, it can be a tricky situation as it can easily cross into inappropriate behavior, so it's better to avoid it.
She could forgive the person who tricked her and they become closer friends. For example, if it was a sibling who tricked her out of a bit of mischief, she realizes it was all in good fun and they share a laugh about it in the end.
First, you can create a simple mystery. For example, hide a small object in the house and write some clues about its location. Then, give your sister the first clue and start the search together. This gets the excitement going.
Well, once when babysitting my little sister, we decided to have a pretend tea party. I made her 'fancy' tea with lots of pretend cream and sugar. She then started to sing a made - up song about being a princess at the tea party. It was so hilarious as she made up these wild lyrics. We ended up dancing around the living room with our tea cups in hand.
Well, let's break it down. If 'little sister' is the main character, and 'empties balls' could mean she is taking balls out of something, like a box or a bag. But 'bj' is really throwing me off. Maybe it's the initials of a place or another character. So a possible plot could be that the little sister is helping to set up a ball - related event. She empties the balls from storage and then has to wait for someone named BJ to arrive to start the activity. But again, this is all speculation given the very odd and unclear title.