i made Mr. Potato head for my son's birthday last year. It WAS a stand up cake, however......just before I went to bed, I checked on the cake and it had collapsed!! I have forgotten to dowel it!! so at midnight, I had to re-bake and re-make..I was too exhausted to do the stand up cake again that this was the alternative....my son, who had seen the original cake, was very disappointed. I had made all the pieces so that he could 'make' his Mr. Potato head himself!! well...lesson learned!!!