The protruberant belly of Ganesha signifies abundance and prosperity. It is said that Kubera, the God of wealth, once went to Shiva and Parvati and wanted to show of his wealth. He invited them to have a meal at his place. They refused his offer and said it would be sufficient if he could feed Ganesha amply. Kubera laughed at this. Ganesha went with him. He cooly kept on eating the food offered to Him but His hunger could not be satisfied even after the entire ration had been finished. So He started eating up the articles around. Kubera was terror struck. Ganesha then said to him that he had promised to feed Him to the full but He was still hungry so He would eat Kubera. The latter ran off to lord Shiva and pleaded with Him to save him. Shiva asked Kubera to feed Ganesha a fistful of rice without pride. He did so and Lord Ganesha was sated. Thus He does not desire us to offer our material possesions to Him, He only blesses the humble and the devout