According to Shiva Purana, Ganesha was their son without the participation of Shiva but Ganesha idolized him. Here we see Ganesha paying obeisance to Shiva Linga - the yoni bhaga of which rests on an inverted lotus pedestal. At the base of the linga a cobra, a symbol of Shiva's sexual energy, is seen coiled around. The third eye of Shiva is also engraved on the Shiva's linga.
With bent knees and hands in anjali mudra, Ganesha raises his trunk paying salutations to Shiva. He wears a small crown and other ostentatious jewellery. A snake is knotled at his stomach, being used as a waist belt. On his trunk are engraved Shiva's attributes and the symbol AUM. Also seen kneeling besides him is his vehicle, the mouse.
The images of Ganesha and the Shiva linga are placed on a cluster of boulders. Snakes can be seen sliding in and out of them.
This description by Renu Rana.