Kinder drawing to cake

I wanted to take some time to address how important drawing abilities are to cake decorating. Drawing has always been my down fall. Here is an example of how a simple yet childish sketch was transformed into a cake. I have done some research of cake designing software and have come up empty handed. This software would make my life so much easier. Please comment with suggestions.

Vanilya Bakery is an appointment only cakery located in Philadelphia, PA