Global Hindu Heritage Foundation started Bala Samskar to teach the richness of our ancient culture, the meaning behind every action, the science behind our customs, the age-old traditions that were passed on for millennia. Also, the diversity of customs and the respect for our culture that has been transmitted for centuries. 
Pada sparsa of parents is one such custom that is as old as Sanatana Dharma. Touching the feet of elders is an age-old Indian tradition that is considered to be a mark of respect. This gesture can be seen in almost all Hindu families, both in India and abroad. Indians believe that when a person bows down and touches the feet of their elders, their ego gets suppressed as this gesture indicates respecting the age, experience, achievements and wisdom of the person whose feet are being touched. The elder person then, in turn, blesses the person touching their feet. Here are more facts and beliefs about this common Indian practice that you should know.
In the Ramayana, ne can find Rama often kneel and touch the feet of his mother and father as a gesture of respect and to seek blessings, signifying the deep reverence he held for her; this act is often depicted when he is leaving the palace or making important decisions. Also, when Rama was leaving for the forest on exile, he would touch the feet of both his parents to seek their blessings
The gesture of touching feet is a mark of respect towards the elderly. Hindus believe that touching the feet of elders is indicative of respect towards the age, experience, wisdom, and achievements of the person whose feet are being touched. Moreover, the older person blesses the person touching their feet.
When we bend touch the feet of our parents, The nerves in the human body, starting from our brain, spread all over our body and end at our fingertips and toes. While doing pada sparshan, when the fingertips of your hand are joined to the feet of the opposite person, a closed circuit is established between the two immediately and the energies of your bodies are connected – your fingers and hands become the receptor of that energy, while the feet of the elder person become the giver of the energy.
As per Indian scholars, there are three ways of touching feet. The first one is the basic way of bending forward and touching the feet. The second is to sit on your knees and then touch the feet of the other person. The third and last one requires you to lie down on your stomach, with your forehead touching the ground, which is also known as the Sashtang Pranam, generally practiced by devotees in Hindu temples. While bending forward to touch feet, your back and waist are stretched. When you sit on your knees and then touch the feet of an elder, your knees are bent and all of the joints in your body are stretched, which relieves you from joint pain. While engaging Sashtang Pranam, your entire body stretches, and body pain is cured. 
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