One of the most exciting physical milestones for a baby is rolling over. This is the first physical way a baby controls movement and position in the environment. Those wiggling legs while on the back (supine) and pushing up on arms on belly (prone) are the first movements to prepare for rolling. At face value, rolling looks pretty simple, but the baby has to control the arms, trunk, legs and head in order to accomplish this milestone. At 2 months of age, a baby starts to lift the head to 45 degrees and at about the same time, rolling from the side lying position to the back begins. For the full rolling (prone-supine) to occur, the baby will develop strength in arms by bearing weight propped on elbows between the 4th and 5th month. Supine to prone rolling is typically consistent at the 7th month. Although rolling from prone to supine is typically the first step in the developmental sequence, some babies will first roll from supine to prone first. Rolling in either direction, requires a lot of coordination to plan the movement (motor planning). It is not uncommon for a baby to have a onetime success in rolling, with several weeks passing for consistent success to occur. This is not set back; the baby continues to work towards this skill with each incomplete attempt. Righting reactions play a big part in success with rolling. Baby’s first lead with their heads to “log roll”. This early rolling (4-6 months) is generated by the movement of the head which then activates the head righting reaction. The head rolls first, followed by the shoulders, trunk and legs. The more mature rolling is typically a consistent skill at 9 months. With this maturity, Rolling is most efficient with hips leading in a sequential rolling pattern.