All the things required to make a rubber ducky cake can be easily purchased from your local supermarket. Firstly, build the base or structure for your rubber ducky cake. This can be done using cardboard, pizza tray and anything that will support the walls of the structure of the ducky cake. Make sure that the items you use for the base are strong.
Next, place a bottle of baby shampoo on the centre of the base. The capacity of this baby shampoo bottle should be at least 20 ounces. Consider rolling three to four diapers into a cone or cylindrical shape. Roll up the diaper from the open end and work towards the closed end of it. It is recommended not to open the diaper when performing this step. You can simply roll from the front to the back for convenience. Remember to take your time so that you can do this part successfully.
Use rubber bands to secure all the diapers. It is extremely important to make sure that you wrap the rubber band around each diaper to prevent it from opening. Next, consider placing the rolled and wrapped diapers around the baby shampoo in a vertical position. This will result in a cycle around the baby shampoo. Do not forget to hold the diapers in place by placing a large rubber band around them. Make sure that you use strong rubber bands that will not break or snap easily.
Repeat the above steps to form another cycle of diapers around the first cycle. Again, roll the diapers from open to closed end and wrap them with rubber bands. It is advised to use 12 to 15 diapers for the second ring of diapers. Keep on going until you get it to the desired size. Although it may seem difficult at first, keep practicing and you will soon get the hang of it.