Babies typically discover their feet and start playing with them around 3 to 4 months of age. At this stage, they gain more control over their legs and begin to bring their feet into view with curiosity and a desire to grasp them. By 4 to 6 months, they can bend their knees and often grab their toes, which is an important sensory and motor development milestone. This skill helps babies build body awareness, core strength, and visual focus, and supports later milestones such as crawling and walking.

In summary:

• Babies start discovering their feet around 3 to 4 months.
• By 4 to 6 months, they often grab and mouth their feet.
• This behavior is a key motor milestone supporting core and visual development.

This timeline is typical but can vary slightly between babies.