Place chia seeds, coconut milk, yogurt, protein powder, extract (if desired), and cinnamon (if desired) in a 16-oz. jar (or sealable container); stir well to combine. Seal jar; refrigerate for 30 minutes.
Stir again to prevent clumping; top with as much fruit as will fit in jar. Seal jar; refrigerate overnight.
Serve chilled with any remaining fruit.
The Nutrition Facts box below provides estimated nutritional information for this recipe.