Ganesh Puja in India

2-3 months prior to the day of Ganesh Chaturthi, Life-like clay models of Lord Ganesha are made for sold by specially skilled artisans. They are beautifully decorated & depict Lord Ganesh in various poses. The size of these idols may vary from 3/4th of an inch to over 25 feet.
Ganesh Chaturthi starts with the installation of these Ganesh idols in colorfully decorated homes and specially erected temporary structures mantapas (pandals) in every locality. The pandals are erected by the people or a specific society or locality or group by collecting monetary contributions. The mantapas are decorated specially for the festival, either by using decorative items like flower garlands, lights, etc or are theme based decorations, which depict religious themes or current events. The idols are worshiped with families and friends.
The priest, usually clad in red silk dhoti and shawl, then invokes life into the idol amidst the chanting of mantras. This ritual is the Pranapratishhtha. After this the ritual called as Shhodashopachara (16 ways of paying tribute) follows. Coconut, jaggery, 21 modakas, 21 durva (trefoil) blades of grass and red flowers are offered. The idol is anointed with red unguent, typically made of Kumkum & Sandalwood paste . Throughout the ceremony, Vedic hymns from the Rig Veda, the Ganapati Atharva Shirsha Upanishad, and the Ganesha stotra from the Narada Purana are chanted.
For 10 days, from Bhadrapad Shudh Chaturthi to the Ananta Chaturdashi, Ganesha is worshipped. Sponsored Links
On the 11th day, the idol is taken through the streets in a procession accompanied with dancing, singing, and fanfare to be immersed in a river or the sea symbolizing a ritual see-off of the Lord in his journey towards his abode in Kailash while taking away with him the misfortunes of his devotees. All join in this final procession shouting "Ganapathi Bappa Morya, Purchya Varshi Laukar ya" (O father Ganesha, come again early next year). After the final offering of coconuts, flowers and camphor is made, people carry the idol to the river to immerse it.
The main sweet dish during the festival is the modak ([modagam]or modakam in South India). A modak is a dumpling made from rice flour/wheat flour with a stuffing of fresh or dry-grated coconut, jaggery, dry fruits and some other condiments. It is either steam-cooked or fried. Another popular sweet dish is the karanji (karjikaiin Kannada) which is similar to the modak in composition and taste but has a semicircular shape.
Public celebrations of the festival are hugely popular, with local communities (mandalas) vying with each other to put up the biggest idol & the best pandal. The festival is also the time for cultural activities like songs, dramas and orchestra and community activities like free medical checkup, blood donation camps, charity for the poor, etc.
Today, the Ganesh Festival is not only a popular festival - it has become a very critical and important economic activity for Maharashtra. Many artists, industries, and businesses survive on this mega-event. Ganesh Festival also provides a stage for budding artists to present their art to the public. The same holds true for Hyderabad too.
For the year 2007 in the Western Calendar, Ganesha Chaturthi commenced on Saturday, September 15th and its allied festival for Ganesha's mother, Gauri (a form of Parvathi) called Gauri Puja comes on September 13th (the day before) [1].