my baby 1 1/2 years finished sir but he can't start to walk sir, he legs are look very thin, which food help to legs strength

A. Hello mom try to massage his legs daily and exposure to morning sunlight to get required source of vitamin D , will be helpful . Also check if he was able to achieve his other milestones on time . Also regular good healthy home cooked foods are preferred over packaged and ready to eat mixes . Get him once examined by the paediatrician. Does he try to walk with support ?