In a disabled care there are boys/girls men and women. They are disabled and often mentally retarded. So they communicate at a low level, sometimes they are 60 but they communicate and think like an 1 year old. My question is if i can touch them (boys/mens). If they were Muslims then they do not have to pray or fast right?

Yes there is no obligations on them due to being not of sound mind. However you should adopt precaution and only touch them as much as necessary.