Castle Diaper Cake Anyone Have -Diaper Cake Castle -Instructions?

Anyone have -Diaper Cake Castle -Instructions? - castle diaper cake

My sister is having a baby comes quickly and your baby shower, and I want to make a castle cake soils. I have a diaper cake cakes in the past, but never a castle. Has anyone instructions or do I find a site with instructions on how to build a castle cake soil? Or ideas useful to you?