American Baker in Germany

This cake was a request from a friend of mine organizing a baby shower for another friend. She asked me to make a cake for it and can it please be vanilla cake with Swiss meringue buttercream. No problem. I know just the design. I had recently attended a baby shower with a baby belly cake and I wanted to make one, too. The expectant mother is having a boy, so I decided on a blue dress. The first thing I did was cover my cake board with iridescent craft paper. Then I wrapped it in plastic wrap to make it food safe.  I had baked six layers of vanilla cake, but it was only two recipes of it. Two layers of ten-inch cake and four layers of four-inch cake.  Here's what it looked like unpacked.  I began by sticking down the ten-inch cake onto the board with a bit of buttercream. Then I stuck down the four-inch cakes the same way just above the ten-inch, but touching it.  I filled and stacked my cakes.  I realized that my four-inch cakes weren't even...