Prepare instant pudding mix according to package directions. Separate pudding into 7 individual dishes.
Place dishes in a line & add 2 drops of food coloring to each dish. The rainbow colors you need are red, orange, yellow, green, blue, indigo & violet.
Layer the pudding by adding about 2 Tbsp of each color to individual parfait glasses. Tap the bottom of the glass on the counter after each layer to make the layer flatten. Refrigerate until fully set. Top with a dollop of whip topping to represent a cloud.