The Sun is the star at the center of the Solar System, it is by far the most important source of energy for life on Earth. Combinations of Sun element in Little Alchemy is interesting, you could make Fruit, Rainbow, Electricity, Sunflower, Day, Solar Cell, Gold, Aurora, and more. The process of Making Sun is not complicated, you just need 4 steps to make Sun from the basic elements. Check out the below instructions and try it yourself.
Fire + Water = Steam
Steam + Air = Cloud
Cloud + Air = Sky
Sky + Fire = Sun