Small passerines make up a large part of the global diversity of birds, but they are underrepresented in zoo collections, although many species are kept and bred by private hobbyists, especially estrildine finches commonly referred to as waxbills. It seems to me that as many seed eating species are quite compatible with each other, at least given sufficient space, a walk through exhibit similar to the ever-popular butterfly house might be quite a good display - are there any collections, especially in the UK, which have a reasonable number of species?
