Cartoon trees are one of the easiest things to learn to draw. Once you have a basic tree, you can start varying your tree types and shapes to create whole forests. But before you start experimenting, let's start with four basic steps to creating trees. Step 1: This is actually really simple. You are going to draw two vertical arcs, starting about the same height and about the same length. Make them curve a little differently, though, to give your tree character.