Peel the banana and remove any damaged spots. Cut into slices and place in a blender or food processor.
Add the juice and yogurt.
Blend until the drink is completely smooth.
Refrigerate any leftover drink immediately.
For the Older Crowd
If you're whipping up this drink for grownups, there are a couple of small additions you could make to improve on the flavor and texture. Try using crushed ice instead of orange juice, and add a touch of banana liqueur. You can also add a bit of lemon juice, or serve it with a slice of lemon in the glass — the acidity will make a pleasing contrast to the banana.