I designed this cake for my daughter's 2 years old birthday. First I started off by drawing a concept of the cake in photoshop, my husband made a rough 3D look in sketch up to see the actual size and dimension. I found this really nice display stand which rotates smoothly even with this 8 inches cake on top. https://www.amazon.com/Motorized-Display-Yuanj-Jewelry-Collectibles/dp/B010NBNCBY/ref=sr_1_3?ie=UTF8&qid=1501455576&sr=8-3&keywords=rotating%2Btable&th=1
And then I designed all the deers on top of the cake including snow white and the birds. I print the sketches in actual size as reference.