what comes into their eyes- clumsy phrasing, just say 'what they see'
That must be their parent’ responsibility- change 'that'
take control them- preposition
violence programmes- adjective not noun
showed- past participle not past tense
some also contain adult’s categories.- some what? adult's categories- adult material?
suit for children - no preposition, or use 'be suitable for'
scale of “children” or “kids”- scale? unclear- use 'younger children' or something
I totally agree- with what?
Except for the children who have grown up, strictly speaking, over 18,- they are adults over 18, not children
obese- noun not adjective
adult and children- make both plural