sis, this is from Simon Hoggart's column in the Guardian last Sat:
"After my not very subtle hints, my wife bought me a worm farm for my birthday. It's a series of heavy-duty plastic trays, with a lid and a reservoir thing at the bottom. It comes through the post; you set it up, then send off for the packet of worms.
A day or so later they arrive in their own sealed bag, wriggling round in the soil, apparently quite happy. They're not ordinary earthworms though; they're special composting worms. You sprinkle the lot on top of the coir matting (provided). There are about 1,000 of them and I'm fond of them, though it's going to be a bugger to find different names for them all.
On top of this you need to put lots and lots of kitchen scraps. Not just potato peelings, broccoli stalks, banana skins and the like, but egg shells, used tea bags - and cardboard. They're very fond of cardboard.
Soon we will get lots of fresh compost, long before it would be ready in a compost heap, and a supply of fluid which I suppose is just worm wee, but which apparently causes houseplants to grow like triffids and saplings to turn into giant redwoods overnight. It's richly satisfying. I visit them twice a day in the shed and they still seem very happy. They're terrific pets, too, since they don't smell and they don't leave hairs on the sofa. My wife found them at wigglywigglers.co.uk. "
He doesn't mention flies (yet....)