Help! Trying to wean the kittens..?

I have 5 4 week old kittens, and I've started weaning them, or at least am attempting to. 3 of the 5 are lapping up the KMR, and a couple are even attempting to steal a nibble of mom's kitten food that I've put down for her. My problem is that I'm having a hard time getting the other 2 interested in the KMR. I've tried the finger dabbing, and leading them to the dish, "accidentally" spilling a little on their paw, which they do lick up, but I can't seem to get them interested at all. They only want mom. Another thing, is mom always tries to eat their food. I've separated her from the kittens while I try to feed. Again, some are hungry, others turn their noses up. Hubby tells me not to worry, because mom will eventually push them away from her. Is there a no nonsense way of helping these kittens out. I don't want them to starve. Please advise! Thanks!