Devotees of Ganesh bring the idol of Ganesh to their houses on this day with chants of 'GANPATI BAPPA MORYA'. and worship the Idol of Lord Ganesh. People do puja, of the idol twice a day - morning and evening till the idol is in their home. Maharashtrians make sweets called 'Modak' and offer them to Ganesh.
The Ganesh idols are kept for either one and a half, five, seven or ten days and then the 'Ganesh Visarjan' is performed, whereby the idols are immersed in sea waters.
Freedom fighter Lokmanya Tilak started the custom of 'Sarvajanik Ganeshotsav' (public festival) in Maharashtra, during the Indian Independence fight against the British. The aim behind this was to bring the people close to each other. From then on, this festival is celebrated in almost every lane, housing society and area in Maharashtra and thus making Ganesh Chaturthi a public festival. Huge 'pandaals' or stages are set up and decorated beautifully and people worship the idol of Lord Ganesh together.
MORE ON LORD GANESHA
THE MEANING OF GANAPATI:Ganesha is a son of lord Shiva and Parvati. When Shiva was coming back from his "Samadhi", he didn't know that Ganesha was his son. Ganesha didn't let lord Shiva in the house because mother Parvati was bathing. Lord Shiva got mad and cut his head off and went in to the house. When Parvati saw the bloody 'Trishul' she got scared and asked him what happened. Lord Shiva said that he had cut a little boy's head off because he wouldn't let him in to his own house. Parvati cried and told Shiva that Ganesha was his son. Shiva felt bad for what he did, and threw his "Trishul." The "Trishul" returned with a head of a baby elephant. Lord Shiva put the head on Ganesha's body and gave him life. Lord Shiva also gave him a 'Vardaan' that, every time something good is supposed to happen, then people will take your name before mine.