Can I do it?

I want to make thi shape of cake for Makenzies birthday (yes I know she is only 6 months old but I am bored at work). We won't need that much cake so I want to make the top two layers styrofoam and the bottom big layer be cake.


I am not sure in this creative or talented but we will see. I might practice on the next holiday. Anyone ever attempt this type of cake at home ? I'm not wanting to use the fondont either. Not sure if that is possible.

Maybe i should go to just go to a bakery!