Awww..that's so cute, Becky. Well, at the very least, your kitties will need food, a place to sleep, a scratching post or pad, and a litter box and litter. Of course, you could get them some toys as well. Small kitties will play with anything really. I used to tie an old baby sock to a dental floss and they would chase it around the house. LOL.
You could purchase a special bed for kittens, but if that isn't doable, then you can always make a bed yourself out of a cardboard box lined with towels or a small blanket.
As far as kitty food, I'd recommend anything (perhaps IAMS or SCIENCE DIET if available) especially formulated for kittens so that they can grow strong and healthy. Also vaccinations (i.e, feline leukemia, feline AIDS, tapeworms, hookworms, and rabies) are very important; however I don't think that kitties can get a rabies vaccine until they are eight weeks or older.
Also monthly topical medication is needed to keep them free of fleas and ticks. My kitties are in-door; I never let them out but still sometimes fleas may get into the apartment from outside so it is always best to be prepared IMO.
Good luck and I hope you are able to post some pictures.

tink