I'm not sure specifically as I haven't read it in detail. But generally, light novels often revolve around unique relationships and storylines. It might be about the relationship between the protagonist and his little sister within a certain context, like a school or a fantasy world.
You can try looking for it in local bookstores that carry light novels. Some big chain bookstores might have a section dedicated to Japanese light novels.
Set some simple rules before you start playing together. Like taking turns to play with each toy. This way, both of you can enjoy the toys without any quarrels. Also, be patient with her as she might not be as experienced in playing with the toys as you are.
I'm not entirely sure as I haven't read it in detail. But generally, a light novel often involves various elements such as unique characters, an interesting story setting, and probably some sort of adventure or relationship - building among the characters. Maybe nakaimo light novel has its own special world - building, like a fictional place with different rules and cultures.
I babysat my little sister last weekend. We baked cookies together. She was so eager to help, but ended up making a bit of a mess with the flour. However, the cookies tasted great in the end.
One way could be to take away her privileges like not allowing her to play with her favorite toys for a while. For example, if she misbehaves during playtime with friends, this can teach her that bad behavior has consequences.
One way could be to make her do extra chores. For example, if she's been mean to you, ask her to clean the dishes for a week. It teaches her responsibility.
Several of Xia Mingyou's novels were considered sister novels as follows:
1."There will be an angel to love you for me" and "Angels love beauty" are sister chapters;
2. To Our Lost Youth and Tiny Times are sister novels;
3."So You're Still Here" and "Startling Step by Step" are sisters;
4."How Many Flowers Fall in My Dream" and "Sunny Day Piglet" were sisters.
It should be noted that the fact that Xia Mingyou's novels were called sister novels did not necessarily mean that they were written by the same author or that there were similarities in the storyline. It could also be different due to different writing time and styles.
It can be normal to some extent. Young children often explore their bodies as part of their natural development. However, it's important to teach her appropriate behavior and privacy. If it happens frequently or in inappropriate settings, it may need more attention.
Another art project could be making collages. She can cut out pictures from magazines of things she likes, such as animals or flowers, and stick them together on a big piece of paper to create a unique composition. It's a great way to express her creativity and interests.