The Superlambananas are based on a sculpture commenting on genetic engineering and the combination of a lamb and a banana. They look nothing like lambs though, so I've renamed them Calfcasavas. Or possible Dogplantains; as you like.
There are now over 120 of them around Liverpool, decorated by various artists and communities, and they're my favourite bit of the capital of culture thing. Not because they're very good — many of them are not. But because there are always people photographing them, riding them, and talking about them. They've genuinely engaged the public.