In a bowl mix yogurt and powdered sugar to make cream. Fill the cream in a piping bag. Add some muesli (contains nuts oats, and cornflakes) to the serving glasses. Squeeze the yogurt from the piping bag on the top of the muesli. Top it with chopped papaya cubes and strawberry slices. Squeeze yogurt again to make another layer. Place melon and watermelon balls on top of the yogurt layer. Garnish the yogurt parfait with mint leaves and chopped kiwis.