Prepare and bake cake mix according to box instructions. Allow the cake to cool completely.
Using the end of a wooden spoon or a straw poke holes in cake.
Prepare each box (color) of Jello in a separate bowl or large measuring cup. To Red Jello add 1 cup of boiling water and stir until dissolved then add in 1/2 cup of cold water and mix completely. Repeat with Blue Jello.
Carefully pour red Jello over the cake alternating in alternating rows over the cake. Make sure to get Jello into the holes of the cake.
Repeat with blue Jello until entire cake is covered.
Cover and refrigerate the cake for 3 hours or overnight for Jello to set up.
Remove cover and spoon whipped topping over entire cake. Decorate with Red, White, and Blue Sprinkles and Candies.