The twins are 10 months old today

Ten months, and they are both crawling.

Orli has been crawling since late December, just over two months now. Zev started crawling last week, he just figured it out one day. Zev can point now as well and yesterday we think we saw him using the sign for "potty". Orli stands on her own often while she's holding a toy with both her hands. She likes to get up on one knee and clap her hands while she's crawling around her toys.
Both are very good at looking back at you and then abruptly facing forward and then they try to crawl as fast as they can away. Laughing the whole time.
The twins are starting to communicate to one another, they do this primarily through raspberries, Zev will start it off and Orli will respond, this goes back and forth for a little while.
They laugh hysterically at each other when they play together in the pack-n-play or crib. All Orli has to do is shake the toys hanging from the mobile and Zev has a fit of laughter. Then to get her to laugh, Zev will crawl over and rub top of his head on Orli's back or side and she'll laugh and laugh and even try to get away, only to pause so he catches up.
One thing that is funny is that Zev takes little tantrums, when you pick him up when he's involved in something he kicks his little feet in the air and cries. He screams really loud to get your attention, it is an ear piercing scream. Orli, when you pick her up and put her in the pack-n-play so you can go fetch something, she makes a really sad face, stops breathing and a few seconds go past, she takes her breath and belts out the most sad pitiful cry.