Mundan Sanskar Puja is a Hindu ritual that is performed when a child's first hair is shaved off. It is believed that the hair from the first birth carries the child's previous life's negative energy, and the Mundan ceremony helps to purify the child and protect them from evil forces.

The Mundan Sanskar Puja is usually performed between the ages of one and three years. The ceremony is conducted by a priest, who chants mantras and performs rituals to bless the child and ensure their well-being. The child is bathed before the ceremony, and then their head is shaved. The hair is then either offered to a deity or thrown into a river.

After the ceremony, the child is given a bath again and is dressed in new clothes. Family members and friends are invited to the ceremony, and a feast is served to celebrate the occasion.

The Mundan Sanskar Puja is considered an important ceremony in Hindu culture, and it is believed to have both spiritual and social significance. It is a way to honor the child's development and prepare them for their future life.