Title says it all really. DS2 is a chatty babbley baby. He sits unaided, claps when we say 'clap clap' to him, he smiles, laughs, waves. He rolled at 4 months on to his tummy and rolled from his tummy onto his back at 6 months. Since then he has just rolled everywhere. He can get from one room to another purely by rolling and slithering about but is really no closer to crawling than he was at 6 months! He occassionally will lay on his tummy and lift his bum right up as if he wants to crawl but then flops and reverts to rolling again :-S. I took him to the health visitor to see what they suggest and they checked his hips, legs etc and said not to worry til after his 1st birthday and then they will refer him for further checks or scans if needed. I am worried. I know I shouldn't compare but DS1 was walking at 11 months whilst DS2 makes no effort to pull up or stand even though he can weigh bare. Do I need to worry?