It has been an inquisitive gesture for everyone, especially kids as they put forth the question while looking upon their favourite God Ganesha. Here’s the tale of how the transformation happened.
Goddess Parvathi had lots of servant maids like Nandini and Bhringi and she asks them not to allow anyone while she is taking bath. Apparently, when Lord Shiva enters the place without listening to their maids, Parvathi is left with an idea of creating her own son.
Out of her dirt from body, she creates a boy named Ganesha and immediately after origin asks, “Mother, what should I do for you?” She becomes so elated and assigns him with the job of not allowing anyone while she is taking bathe.
However, things take a turn when Lord Shiva barges in and is stopped by Ganesha with accordance to mother Parvathi’s instructions even after knowing that Shiva is her husband. Infuriated over this gesture, he blows off Ganesha’s head with his Trishula.
When Parvathi is appalled and broken down hearing the news about the death of her son, she creates hundreds and thousands of heavenly Goddesses to destroy the enemies, who were responsible for her son’s death.
Apparently, the heavenly Gods and sage like Narada, Brahma and Vishnu arrive at her place and ask to withdraw her anger and save the lives of Gods.
Parvathi accepts to their request on one condition – to bring back the life of her dead son . Lord Shiva sends forth his men to find someone with the head lying towards the North. Consequently, the head of an elephant is brought and Lord Shiva affixes to the neck of Ganesha and gives back his life.