A Bio degradable and eco friendly Ganpati made with wholewheat flour/Atta. Don't just bring Ganpati home this year,make a biodegradable,eco friendly Ganpati made of whole wheat/atta.Do visarjan in a way that doesnt ollute the rivers. Involve your children and teach them not only about the legend of Ganpati but also how we can be environmentally conscious.
After making the idol, let it cool completely and then spray some cooking spray or rub some oil very gently to keep the murti/idol from drying up. You may use turmeric/haldi and kumkum for decorating. Salt is meant to be a preservative and baking helps in solidifying the murti/idol. I do visarjan in the lake in my neighborhood. The flour/atta becomes food for the fish in the lake. I have never kept the murti/idol for more than 3 days, it may last longer.