One evening last year, I was sitting at my desk in my room working on a drawing for one of my classes when I felt someone tugging my hair. It wasn't like someone was pulling my hair to hurt me, but just a light playful tug. I chuckled and for whatever reason felt a happy/bubbly feeling in my stomach. Whoever this person was, I knew they weren't bad.
A few minutes later, the same presence (from what I could tell) started tugging on the bottom corners of my t-shirt. And soon after that, it started bumping my pencil. It seemed as if it was pushing it to make me mess up a bit. Like a little brother or sister would. For some unexplainable reason I started laughing. I don't have any little siblings, because I'm technically the youngest, I have a twin sister who is 32 minutes older, and an older brother. I know I haven't had any brother or sisters to be, so I have no clue what kind of spirit would want to try to play with me.
I've babysat a few times before, and it seems like the presence that was in my room had the same kind of personality that any little kid would have. Just wanting to get my attention to play with them.
I don't know what happened to the spirit, but it never came back. It just made me feel happy and wanted, which is pretty cool.
I would also like to encourage you to submit your stories. I would be interested to hear about your experiences.