It was a fine time for me; five years old, full head of hair and no worries. (sbnation.com)
Most baby carrier hiking backpacks are made for children old enough to sit up independently, with full head and neck control. (checkpregnancy.com)
When the baby achieves full head control, you can vary the positions using an exercise ball, traveling tummy time or airplane tummy positions. (checkpregnancy.com)