Either fresh or frozen fruit will work for this - my wal-mart actually had peaches at 50c a pound yesterday. I couldn't believe it!
This is my best guess at how I make it (since I never measure):
Blueberry Peach Smoothie
1 cup blueberries (fresh or frozen)
1 peach, cut into chunks (fresh or frozen)
3/4 cup vanilla yogurt (our favorite is Dannon)
1 cup milk
1-2 Tbsp honey
sprinkle of cinnamon
Put all ingredients in a blender and blend away!
Makes 2 large glasses
To make it even healthier sometimes I add a bit of flax. Don't skip the honey and cinnamon - they totally make this smoothie-licious!