Quarter the strawberries and dice the kiwi. Cut grapes in half.
Add all of the fruit and the brown sugar and cinnamon to a large serving bowl and stir gently to combine.
Cover tightly and refrigerate for 30 minutes before serving.
To make in advance, combine all of the chopped fruit in a mixing bowl up to 24 hours in advance. Add the brown sugar and cinnamon and stir gently 30 minutes before serving. Substitute any fruit that you prefer, such as apples, bananas, watermelon, etc. Adjust sugar as needed.