This stuff is old news but still had cute pics to show so I'm sharing anyhow. A couple months ago they started pulling to stand. One of the pics shows them both standing in their cribs and it was the first time they both pulled to stand. . .that we witnessed anyhow. I heard laughing in their room towards the end of their nap, walked in and there they were just standing and laughing at each other. Grace loves to fling clothes (folded or unfoded) from laundry baskets, drawers, etc. They are crawling everywhere. We have a playroom that is essentially baby proofed that we put them in when we're feeling lazy but when we 'let them loose' there's so much exploring to do (wires, lamps, dog bowls, remotes) around our little house. I'm sure when they are older they'll ask me, "mom, which one of us crawled first" so just for the record here's the milestone tally so far:
first to roll over: lydia
first to pull to stand: lydia
first tooth: grace
first to babble: grace
first to wave: grace
first to crawl: lydia
first to pull to stand:lydia
First to walk:???, they are taking their time :)

Pics to to bottom:
twins first pull to stand
Mas giving Lydia her bottle
Grace and her Laundry