personally i dont think so, i seen documentaries of it actually being done, its not nice to watch, but i did, did you know the people doing the "freezing" are not qualified. personally i think its just a request to keep the little one happy. think of your brain as kind of like ram which you get on a computer, it stores memory whilst there's power going into the machine but if it switched off then it loses that memory. the brain works similarly but the brain does not lose its memory immediately after death but about an hour after death so that all the brain cells are dead. and this girl had cancer and that makes "activation" harder. and what the risk of damage to the cells?
but if the body is put in like a deep state of hibernation like a coma then its possible but then maintenance and cost goes through the roof and it would cost like millions as opposed to tens or hundreds of thousands.