What should a baby be doing at 6 months...?

Just wondering, I have a six month old little girl. Everything is fine with her, she's sitting for good periods of time by herself, rolls over and gets in the crawling positon, and tries like crazy to take off, loves to stand, and walks all over the place if she's being held up. She jabbers up a storm, very alert, eating of course stage 2 foods, but also some easily dissoving finger foods, like the gerber puffs, and the baby mum-mum rice rusks, I think all of this is pretty impressive, but being a first time mom, is there anything else she should be doing, is she around average, above or below????