my baby is 3 and half month she started rolling for her 2 and half month but sister son also 3 month he feel right but he doesn't rolling but my baby is feel very soft like she is weak it my thinking is good

A. A child learns to roll over between the time of three months to 9 months and you are suggested to give more of tummy time after three months complete to encourage child some kids but that’s very rare most of the kids reached the milestone in the right time so there is no problem