whole strawberries and blueberries or raspberries
a few ice cubes
Throw it all in a blender and she could drink it with a straw....and you could save the leftovers in the freezer for later. Plus, she would probably really have fun tossing berries and ice cubes and banana in the blender, which turns into a really fun teaching experience anyway regarding learning words and colors and names of things.
Plus, I think there's a special kind of oil you can add to smoothies like that...maybe flaxseed oil? I'm not positive, but someone else around here might know...