He can sit up unaided, if he leans forward he can get back up to sitting unaided, but if he leans backwards or side wards he falls (obviously I'm always with him so he doesn't hurt himself)
He can roll really well on to his front, does it constantly but he can only roll to his right. He can't roll to his left, and he can't roll back into his back, he stays on his tummy and then cries to be rolled back over.
He's been like this for 3 weeks, gets lots of practice and what he can do he does consistently but not made much progress yet with the falling/not rolling back.