Using a baby carrier is an excellent way to keep your little one close and safe while out in public. Although you can begin using the baby carrier when your child is between the ages of 3-7 months old. Before that point, little babies need extra support and are usually not strong enough to hold up their own heads while being worn in a baby carrier. At this age, they also tend to be more fidgety and can easily become uncomfortable if they don’t get the support they need from the fabric of the carrier or their parent’s body.