My newphew Mason, turned 28 weeks last thursday. He can't sit up for long unattended yet, where his brothers could all sit up around six months old on their own. Soo.. I would not worry all babies are different. Mason Lies on his belly, and tries to pull his legs under him, and when he gets his legs under himself, he falls flat on his face! So.. Mason's nowhere near crawling yet.
I hate it when people compare babies aswell. My friends cousin was born three weeks after Mason, and she always tries to compare the babies with each other. Really annoys me!!!

Btw...Noah is such a cutie
