My 3 year old would like an octonought cake. I’m planning on making something like the photo below. I’m going to use frosting because I have never covered sponge cake with vanilla icing before and I have plastic figurines. I’m going to try and make some decorations shells etc using a the mould in the other photo. Do you think it will work? Will I need dowling for two tiers? Do I need any specific tools? Does anyone have any tips or suggestions please. TIA