I need to make this for the top of a cake for this Sunday.
What does everyone think would be the best to use? Gumpaste? Fondant/Gumpaste? Colorflow? Iced Cookie?...And It has to stand up...
I would be inclined to use color flow, with a good application on the back to encase a couple of skewers for support. (Or in the case of some I've done, a couple of popsicle sticks.)
These figures were color flow:
<a href="http://cakecentral.com/g/i/1475187/a/1476187/a-favorite-t-v-program-brought-to-cake-i-drew-the-characters-then-filled-in-with-flood-work-rocket-ship-is-cherry-flavored-fondant-covered-cake-rocket-rear-is-gum-paste-while-the-rockets-are-fondant-covered-rkt/"><img src="http://cakecentral.com/image/id/862944/width/400/flags/LL"></a>
As were these:
<a href="http://cakecentral.com/g/i/2184394/a/2185394/for-a-one-year-old-who-loves-word-world-the-cake-and-the-smash-cake-are-wasc-strawberry-bc-filling-white-choc-cheesecake-mff-over-white-choc-ganache-figures-are-flowed-sugar/"><img src="http://cakecentral.com/image/id/233805/width/400/flags/LL"></a>
I place my supports on the backside of the dry piece and paint the color flo over the top. This strengthens the piece and also embeds the support.
I'd do it in gum paste or fondant with tylose/cmc/gum-tex added to it.
I'd make a single backing piece the size of the entire piece, build up the features, having inserted 3 skewers into the thicker part--the facade with the door and window--one dead center and one at each inset corner.
I'd dry it flat in my oven with just the light on until Saturday and then I'd continue the drying process using a fan, turning it over every now and then, until the time that I packed it up in an unsealed cardboard box for delivery.