Once Devi Parvati was alone in Kailash. Shivji went outside Kailash for tapasya and Kartikeya went to Southern Part of the world to save the people from demons.
So she want someone who will spent time with her. One day while she was going to take a bath ,she collected her dirty things from her body and placed all of the dirty particles near the river. She made a idol with those. Then after taking bath she surprisingly saw that the idol turned into a small child.
The baby called,"MAAAAAA"
and Parvati became so happy and hugged the child . He said,"You called me and I came MAA. I will always follow your rules and I will always be obedient."
Parvati said,"From Today the world will know you as Vinayak."
She called Nandi and others to meet Vinayak. They were also happy seeing him.
Vinayak said,"Maa , I am hungry. Please give me some food."
Parvati smiled and said," Dear Vinayak what will you like to eat ?"
Vinayak said," I will like to eat Laddoo."
Parvati smiled and said," Today Vinayak , Nandi , and all others will eat Laddoo .I will make with Laddoo with my own hands."
Parvati made Laddoos.
Vinayak took the Laddoos and make a special shape with it. He said,"Maa , see I have make this shape. I like this shape. How is this shape ?"
Parvati said,"This shape is very nice dear. You like this shape. So from today this shape of Laddoos will be known as Modak."
Parvati always had the fear in her mind that she will lose her son. So she went to Narayan in Vaikunth and said,"Brother Narayan, why always I have the fear to lose Vinayak I don't know. But can you give me a way to save him ?"
Narayan said,"Sister Parvati. Do a yagna and Puja ceremony to please me. Then I will give you a boon...