We'll add more details to the face in a minute. First, let's finish out the main shape of the sun by pulling out the rays of the sun. The goal here is to make something curvy and artistic to look at, so for these parts, symmetry needs to be turned off first. Follow these steps:
On the left-hand side of the 3D View, navigate to the the Symmetry/Lock part of the Tools tab in the Tool Shelf and click on the X button under Mirror to toggle X-axis symmetry off.
Switch to the Snake Hook brush (K).
Adjust the strength of the Brush (Shift + F) to between