Making Sand is easy in Little Alchemy, but it is very important. Because the element Sand is necessary for many combinations, we cannot combine most of elements without Sand, for example Glass, Time, Clay, Turtle, Desert, Cactus, Beach, Dune, Sandstorm, and Sandpaper. See the below instructions to make Sand yourself.
Earth + Fire = Lava
Air + Lava = Stone
Air + Stone = Sand