this honestly sounds like typical kitten behavior.
kittens learn to play from litter mates and from mom, kittens that dont have that dont learn it.
kittens and puppies can be fixed at 8 weeks of age and the earlier the better.
if you want your animals to 'fear' you then i honestly have no advice to give you...
kittens require ALOT of play, too little and they tend to act out, in attempt to entertain themselves.
water bottles work, but if she is indeed in heat then most likely nothing will work. getting her fixed is a serious issue, it prevents more kittens being born, specially to a cat way too young to reproduce, and it will halt her hormones and calm her way down. this is why its best as early as possible so those hormones never kick in and behaviors arent learned.