A few months ago (oophs) I went to a cupcake decorating workshop at Cupcake Sweeties. Great fun and you get to eat your creations! The workshop had an amazing assortment of possible toppings - see that shaker tower? Yum!
I was so surprized about the overlap with modelling clay. Some of these molds are fantastic! Fern, anyone?
And the idea of combining them to get a 3D shape, great stuff! Pity they're so expensive...