How to draw a snail with a pencil. Step-by-step drawing tutorial. Step 1. Outline the body and the shape of the snail. Step 2. Add lower and upper tentacles with eyes to the snail drawing. Step 3. Draw the spiral pattern on the snail's shell. Step 4. Draw details of the snail's body and shell. Step 5. Finish hatching and shading the snail's drawing.