Wash the strawberries, grapes, and blueberries thoroughly under cool water. Pat everything dry with paper towels to prevent excess moisture. Slice the strawberries in half lengthwise so they fit easily onto the skewers.
Begin each skewer with a grape to help secure the ingredients. Alternate grapes, strawberries, blueberries, and cheese cubes in any pattern you like. Finish each skewer with another grape to help keep the fruit in place.
Arrange the assembled kabobs on a serving platter. Place them in the refrigerator while you prepare the dip. Chilling keeps the fruit fresh and refreshing until serving time.
Add the softened cream cheese and sour cream to a medium mixing bowl. Beat them together until the mixture becomes smooth and creamy. This creates the perfect base for the dip.
Mix in the cocoa powder and brown sugar. Continue stirring or beating until everything is fully incorporated and the dip has a rich chocolate flavor. Make sure there are no lumps remaining.
Transfer the dip to a serving bowl and refrigerate until needed. The chilling time helps the flavors blend together beautifully. Serve alongside the fruit kabobs for dipping.