The key to drawing a Christmas tree is to start with the trunk and branches. The trunk is typically a straight line that tapers at the top. The branches should be made of curved lines that extend outwards from the trunk. The branches can be of different sizes and shapes, depending on the look you're trying to achieve. For the leaves, use small, triangular shapes. Santa Claus is a bit more complex, but the key is to start with his body. Draw a circle for his body, and then add his head and arms. His head should be a circle with two small circles for his eyes.