The layer’s parameters: Blending Options>Inner Glow

 



On the made hand we’ll add the mitten with the Pen Tool (P) which shape may be corrected with the Convert Point Tool.



The layer’s parameters: Blending Options>Gradient Overlay



Gradient’s parameters:

 



Use the last applied method for drawing the left arm, placing this layer lower than the layer containing the snowman’s jacket (on the layers’ panel).



The layer’s parameters: Blending Options>Inner Glow

 



Select the last applied method to represent the second mitten:



The last mitten’s layer’s parameters are the same with the first one:



Next we have to picture the hat on the snowman’s head, applying the Pen Tool (P) and Convert Point Tool for introducing the appropriate corrections on the hat’s shape:



The layer’s parameters: Fill 0%
Blending Options>Gradient Overlay