Infants normally are able to sit, stand, and walk and climb and balance their feet in a squatting position first year, within second year

within the first year, within the second year

Explanation:

Many toddlers start to sit, stand and walk by the age of 9 to 15 months of age. These are because of the changes that occur in the brain and the spinal cord. By the age of two the brain develops coordination with the muscles of the body and the infant establishes balance on the feet and hip muscles becomes strong that aids in achieving the squatting position.