On this pin you see Ganesha. Ganesha has the head of an elephant and is very well-known. He is the god of Knowledge and Wisdom, he takes obstacles away and is the patron of travelers. Ganesha is the son of Shiva and Parvati.
This is a diagram that describes the symbolism in the Hindu Ganesh symbol. It is one of Hinduism major symbols. It think it is interesting because even the most basic thing can have so many symbols within.