Mine rolls both ways, sits up (but not straight yet), stands up while holding onto something, she "worms" (crawls) to get something she wants & just this past weekend she starting getting up on her knees! He also pick her feet up to walk. She took a "step" yesterday. My LO is 5 months..
Mine will be 7 months Fri. He crawls, rolls over both ways, pulls himself to a stand and tries to cruise but is still pretty wobbly at that. He will take steps with our help and has stood up with no support for a couple seconds here and there.