To make a river in Little Alchemy 2, you will need to combine water and earth. To do this, simply drag and drop one of the elements onto the other to create the river. It's important to note that you will also need to have an alchemist toolkit to make the river since it's not a recipe that's part of the base game. You can either purchase one or make one by combining a pickaxe and three aether. Once you have the toolkit, combine the water and earth to create the river.
