Your breeder isn't doing the kittens any favors by letting them go so early... it is for the kitten's benefit that most breeders wait until they are 12 weeks of age.
Anyways... my boy likes water, but he won't dunk himself in it or anything.
Usually he'll beg for me to turn on a faucet for him to lick from, or will absolutely bug me to death every time I open a bottle of water for a sip - because he wants to lick from the cap. Spoiled!
If I am taking a bath he'll dip a foot in, but another one of my non-bengal cats will do that as well. I know he has no problem in water a few inches deep if I throw some toys in the tub.
(though I'd suggest waiting until after the faucet was turned off before you tried letting your kitty do that, and let her do it on her own terms.)