Aren't they sweet? What lovely little babies. What luck!!!
The easiest thing for her to do, rather than crating them or sticking them all in a carrier, would be to make a special kitten room in the home...mine was my rather smallish bathroom. Every kitten I've taken in has lived in my bathroom until the rest of my home was kitten-proofed. Or if she has a small enclosed den, or a spare bedroom. Since they are so tiny, they do need to be kept together, in a small space, so that they will remain safe while they're so young...you would not BELIEVE the amount of mischief even 1 kitten will cause if left to roam freely around a home.
Here's some ideas:
1. Make sure the space is small, as I mentioned. Bathroom, bedroom, small den, whatever.
2. No electrical cords, and if so, make sure they are covered either in wire loom jacket, or coated in dish soap to deter chewing, and to avoid the possibility of electricution.
3. Make sure the space is set up for kittens...a kitty bed (a couple of pop can flats or shallow boxes will do...lined with blankets and/or towels), food and water dishes (it is preferable that there be one bowl per cat...they can share a water dish, however), a couple of tin foil lasagna pans with non-clumping cat litter, a scratching post (best to get them using this while they're YOUNG), and the best part, some toys...toys that cannot be chewed or swallowed.
4. If in the bathroom, make sure the toilet lid/seat is down to avoid drowning accidents.
5. If in an area with drapes or curtains, pin them up, or remove them...otherwise the kittens WILL climb and shred them to bits.
6. Make sure all vents are secure, and kittens can't climb into it and down into your duct work.
Hope this helps a bit. Once they are within the 3-4 lb. arena in size, they can begin to take some short supervised visits into the rest of the home...make sure all of the above applies safety-wise to the other areas of the house! And remind her to have those kittens taken to the vet ASAP, for their first check-up!