Hidden veg smoothie recipes

[RainDancer]

I've decided to make up some freezer bags full of smoothie ingredients that can be chucked in a smoothie maker at breakfast time for my 4 year old daughter. Anyone got any good recipes that have hidden veggies? She likes most fruit, less persuaded by vegetables!

Chocolate peanut butter smoothie
1 cup kale/frozen spinach
1/2 cup blueberries
1/2 cup oats
1 tablespoon peanut butter
1 tablespoon cocoa powder
1 teaspoon honey
Handful ice cubes
About 1 cup milk/yoghurt/water

Sounds delicious!