A baby typically starts walking around 12 months of age, though the range for taking first steps can be as early as 9 months and as late as 15 to 18 months. The process is gradual and involves milestones such as pulling up to stand, cruising while holding onto furniture, and gaining balance and coordination over time. If a baby is not walking by 18 months, it is advisable to consult a healthcare provider. The walking skill develops after a sequence of stages including sitting, crawling, standing with support, and cruising.