Rolling

7 months to fully get the hang of it

12 weeks, he is a pro at rolling onto his tummy but despite the first time of him rolling being tummy to back, he doesn't quite roll back to his back himself much yet

3months crawling at 5mo and able to sit on bottom from laying down on tummy

6 months. She could sit unassisted at 4.5 months but couldn’t roll either way until 6 months. And then she did both ways in the space of 5 mins