First, please introduce yourself in the introductions forum. If you're talking about very small nymphs hand feeding them something like worms is not really feasible. Fruitflies, pin head crickets, or some other tiny insect is your best bet.
I have done the same thing as ABbuggin except with ground beef. And yeah, hand feeding worms to a bunch of hungry nymphs really isn't practical, as I learned firsthand. :evil:
i have only one small one and i had bought waxworms for it before the mantis arrived so when i had actually got the mantid i realized that the worms would be too big so i cut the end off of the worm and fed it, it accepted it no problem. i will buy some fruit flies asap though.