Step 1: Open up a tupperware sandwich box
Step 2: Poke a hole in the lid and put some filter floss in it so it doesn't get fruit flies
Step 3: Pour in worms and food. Food is "anything basically". Baby cereal, rolled oats cooked. I'm using dehydrated potato flakes, I just sprinkle them in once a week, mist with a little water.
I've ignored them for as long as two weeks at a time and when I come back there's signs that they thrived and then kinda waned (grown up the walls and then retreated back to the goop - probably too little moisture), if I had a larger culture they'd probably have more stability, but honestly, these things are only the slightest step up from single celled life form, just a shimmer and a squiggle in media.