They looked quite cute, and I put them in the oven to harden, sitting on a tray with a sheet of special non-stick stuff over it. Took them back out of the oven - a couple of them had fallen over during the baking, but no matter, I thought. Tried to sit them on the work surface to cool. Three out of the five just will not stand up, no matter how I try. So my kitchen worksurface now looks like the aftermath of a penguin party, with drunken penguins lying there looking very, very silly.
Pictures of drunken penguins will almost certainly follow...