My DS has been able to sit up on his own since 5 months but is not able to get there on his own. He tries to hard and usually looks like he is trying to do sit ups but can't go from laying down into a sitting position. I could not really find out what age this is normal but are other LOs doing this yet?
DS1 5/15/11
DS2 12/20/12

Re: LO putting themself into a sitting position?
Baby #2 on the way!
DS is not crawling yet, he's gotten really good at rolling but he has been trying really hard for the past couple days to sit up, he goes from his belly to a side plank position and from there he can get his tush on the floor but can't let go of the arm holding him up yet and usually ends up either back on his belly or on a semi-push up position with one leg still folded under him.
My Blog: Naturally Mindful
My DD is a crawling machine, but almost refuses to sit up. She will in her high chair and stuff, but she won't stay seated for very long. It cracks me up that she crawled before she would even sit for any amount of time!
She's been using her arm as sort of a kickstand right now. So, she's trying to get there from crawling for sure. Today, she was really close, but again she doesn't like to stay seated for long. That girl is lightning fast and far prefers being on the move!
DS2 12/20/12
I don't know for sure why, but I know this is not good for LO's. A therapist would suggest you to stop her now.
Good Luck