The cake itself - the base - was a lemon cake, 2 layers, 13 x 9 inches each, with a mixture of white frosting and strawberry jam between the layers.
The foamcore base and the cake were "painted" with varying thicknesses of white and cornflower blue royal icing to look like the sky and clouds.
The plane, a 747, was made out of white gum paste, and then painted with royal icing and water and food coloring.
I'd never made an airplane before...not a bad first one.
The plane is supported, as it hovers above the clouds, by plastic drinking straws, cut to half an inch above the surface of the cake.