Most babies are already practicing or learning to roll over when they are about three months old. teach your baby how to roll over. 1. induce, three months old babies have started to pay more attention to toys. Moms can use some brightly colored, fun toys on one side of the baby’s body to induce the baby to take the initiative to turn over. 2, if the baby is not able to turn over automatically, moms can help appropriately. Let the baby’s body lie slightly on its side, the mother gently hold the baby’s back, help the baby turn over repeatedly practice. After several training sessions the baby can naturally learn to turn over. The baby in the process of practice turning over, to pay attention to the baby’s safety, the baby in a more comfortable, spacious environment, the number of times a day to let the baby practice turning over generally in 2-3 times, each time in a few minutes or so.