Wash and dry all the fruit thoroughly.
On a large serving board, arrange the raspberries in an arc to form the outermost layer of the rainbow.
Continue building the rainbow by layering the mandarin orange slices, mango chunks, green grapes, blueberries, and red grapes in curved lines.
Place the powdered sugar mini donuts at each end of the rainbow to resemble fluffy white clouds.
Serve immediately and enjoy!