place 1 cup ice into blender and pulse to break up ice. Add banana, yogurt, oatmeal, sugar and raisins and blend. Add remainder of ice and pulse to desired consistency. Remember, if this is going to be drank through a straw, you want to blend it well, or pieces won't go through the straw very well.
Add a little dash of cinnamon and/or nutmeg to this as well! Really tastes like breakfast then!