As the role of technology has been very crucial in everyone's life, children have been accustomed to the computers. One may say using computers will give great knowledge to computers or the more negatives than positives. I believe using computers can have more negative effects than advantages because the computer makes children lazy and violent.
If the children become addicted to computers, they will become lazy in their life and they will no longer concentrate on other important things they have to do. Day by day, as the computer steals their valuable time, they will not show an interest in studies and outdoor games. As a result, they will not only become lazy but also they will not be physically sound. For example, my father bought me a personal computer when I finished my 10th grade because I had got A+ in my 10th grade public exams. As I become more habituated to a computer, I became indolent to do my other activities such as studies, sports and the other extra routines. Consequently, my rank dropped to A- in my 12th standard. If anyone tried to take away my computer from me, I used to behave violently.
Kids act unnaturally if they want to own these electronic machines. This creates abnormal behaviours in children. In future, they will not be social. On the other hand, their important role in their schools will get damaged if this continuous.
Another major disadvantage using computers is, children may use adult sites (above 18 years old sites) instead of using a computer for beneficial reasons. For example, today almost in every website, there are ads which promote dating services, adult contents, etc. These ads and then the time spent on those websites by a kid are enough to spoil a good child.
My conclusion is that the parents should either supervise their children while using computers, internet and encourage them to use it for benefits or do not allow their children to use computers. Otherwise, their children will have to face a lot of problems. 
As the role of technology has been  
very
 crucial in everyone's life,  
children
 have  
been accustomed
 to the computers. One may say using computers will give great knowledge to computers or the more negatives than positives. I believe using computers can have more  
negative
 effects than advantages  
because
 the computer  
makes
  children
 lazy and violent.
If the  
children
  become
 addicted to computers, they will  
become
 lazy in their  
life and
 they will no longer concentrate on  
other
  important
 things they  
have to
 do. Day by day, as the computer steals their valuable time, they will not  
show
 an interest in studies and outdoor games.  
As a result
, they will not  
only
  become
 lazy  
but
  also
 they will not be  
physically
 sound.  
For example
, my father  
bought
 me a personal computer when I finished my 10th grade  
because
 I had  
got
 A+ in my 10th grade public exams. As I  
become
 more habituated to a computer, I became indolent to do my  
other
 activities such as studies, sports and the  
other
 extra routines.  
Consequently
, my rank dropped to A- in my 12th standard. If anyone tried to take away my computer from me, I  
used
 to behave  
violently
.
Kids act  
unnaturally
 if they want to  
own
 these electronic machines. This creates abnormal  
behaviours
 in  
children
.  
In future
, they will not be social. On the  
other
 hand, their  
important
 role in their schools will  
get
 damaged if this continuous.
Another major disadvantage using computers is,  
children
 may  
use
 adult sites (above 18 years  
old
 sites)  
instead
 of using a computer for beneficial reasons.  
For example
,  
today
 almost in every website, there are ads which promote dating services, adult contents, etc. These ads and then the time spent on those websites by a kid are  
enough
 to spoil a  
good
 child.
My conclusion is that the parents should either supervise their  
children
 while using computers, internet and encourage them to  
use
 it for benefits or do not  
allow
 their  
children
 to  
use
 computers.  
Otherwise
, their  
children
 will  
have to
 face  
a lot of
 problems.