Make cake according to directions on the box. Let cool and place frosting or other filler between the two layers.

Frost with white frosting then spray with blue edible spray top and sides.

Place cookies around the cake. Break small pieces off so it is uneven, making it look like a pond.

Place white blobs of frosting on top to create waves or bubbles. Place rubber duck on top. I also added white candies to the top.

Wrap ribbon around to help hold in place.