That looks like such a fun cake!
It doesn't look like you'll need to do much sculpting on the money bag cake. What does the car cake look like?
I'd use a round ball pan or round bowl to bake the cake, or stack and shape round layer cakes. Using a bowl would be easier, though. If it were me, I'd take a Dixie cup or something roughly conical to use as a form to shape the top of the bag out of fondant or 50/50 paste and let it dry. Then I'd stick it on top of the bag and cover it with icing when you ice the rest of the cake.
The 3D Cruiser Wilton pan is a good place to start if the car you're making is a nice chunky one. I had to do a Hot Wheels car with a toy car as a model, and I used stacked sheet cakes for that one since it was long and low.
Hope that helps...
Deanna
I would do like TooMuchCake said and bake in a Pyrex or other oven-safe bowl to do the rounded cake on the bottom. For the top piece, I would use a cupcake stuck to the top with icing, then cover with frosting and decorate as desired! Good luck!
wow thanx so much for the adive for the money cake!
umm for the car cake, Im not to sure what it'll look like, and I dont want to buy another cake pan, so I thought that scultping it would be better.... The man Im making it for loves old cars, and has a business selling car models, so I guess something along those lines
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