8 months... A little late haha

Big boy is eight months (was 8 months on april 3rd lol) im a little behind! He started saying "ma ma" and rolling everywhere but still no interest in crawling at all he has even started to pull up on stuff so we had to put his crib mattress down because he started standing up in the crib when leaving him in there to sleep. He's def in that frustrated stage where he wants to be mobile so bad but he just isn't quite there! But I'm sure it will come way too soon!