they look great don't they. Sugarplum should be able to tell you, but I think she said that the round cake was a bit of cardboard tube, blocked off at both ends and the painted and then covered with glue gun glue. I think the fairy cake was a crumpled up piece of paper wrapped in masking tape and then covered with glue gun glue as well.
I'm thinking of making a proper project out of the cakes, what do you think??
Also why not try and use a bit of foam sponge, you know, like the sort of thing used to wash dishes. cut it in half and then use glue gun glue for the jame and for the icing... should look really like a bit of sponge cake!
don't forget to post or upload pictures of what you make, we'd love to see it.