In a large mixing bowl, whisk together the flour, baking soda, and salt until combined

Preheat oven to 350 degrees and spray a loaf pan with baking spray

Using a standing mixer, beat together the sugar and butter until smooth and creamy

Beat in the eggs, one at a time until combined after each eggs

Mix in the mashed bananas

Gradually mix in the dry ingredients until combined

Divide the batter into 3 bowls: add a few drops of the pink gel food coloring into 1 bowl, add a few drops of the purple gel food coloring into the second bowl and add a few drops of the neon green gel food coloring into the third bowl

Using the medium ice cream scoopers, scoop a few dollops of the pink batter into the loaf pan, scoop the purple colored batter into the loaf pan then sprinkle about 1/4 C of sprinkles onto the top of the two colors

Mix in 1/4 C of sprinkles into the neon green batter then scoop the neon green batter onto the top of the other two colored batters

Bake in the oven for 45-65 minutes or until a toothpick comes out clean

Sprinkle the remaining sprinkles onto the top of the batter

Remove from oven and allow to cool completely

Remove loaf from pan and place onto a wire rack

Using a large mixing bowl, whisk together the sugar and milk until combined and smooth

Pour over the loaf

Sprinkle some unicorn sprinkles on top

Allow icing to harden before slicing