Children nowadaysNowadays, children spend a lot of time withplaying video games. Nowadays, children spend a lot of time playing video games.

The placement of “nowadays” is just a minor correction, don’t worry about it too much. It just makes the sentence sound a little more natural. As an alternative to “playing video games” you could say “on video games”. “With video games” isn’t quite right...

They feelt many emotions such as excitement, happiness and fear when they played video games. They feel many emotions such as excitement, happiness and fear when they play video games.

The rest of your paragraph is in present tense, so this sentence should be in present as well!

They feelt many emotions such as excitement, happiness and fear when they played video games., They feel many emotions such as excitement, happiness and fear when they play video games,

The rest is written is present tense, so this likely should be too :). Alternatively, to highlight that playing in the past leads to them playing in the future, you could write: "They have felt many emotions such as excitement, happiness and fear when they have played video games," This isn't how this would usually be written though.

They felt many emotions such asel things like excitement, happiness and fear when they played video games. They feel things like excitement, happiness and fear when they play video games.

Use the present tense, since this is a general statement. It doesn’t only apply to children in the past, but children today, and in the immediate future too.

So, they want to play video games all the time. So, they want to play video games all the time.

Sso they want to play video gamesthem all the time. so they want to play them all the time.

But İt'this means that they can become addicted with time. But this means that they can become addicted.

Personally, I would combine the two sentences like this. I used different transition words to make it sound a little smoother. "Because of this, they want to play video games all the time, which means that they can become addicted."

But İt'This means that they can become addicted withover time. This means that they can become addicted over time.

But İt'sit means that they can become addicted withover time. But it means that they can become addicted over time.

“it’s” means “it is”. “Its” means “belonging to it”. In this case, you mean neither of these, so you don’t need an “s” on the end of “it”. Put an “s” on the end of the VERB when talking about the action of a 3rd person singular object (for example “it”).

This situation is very dangereous., This situation is very dangerous,

This situation is very dangereous. This is very dangerous.

You don’t really need to specify “situation” here. It’s implied. Mind the spelling of “dangerous”. You have an extra “e” here. =)

Because they don't want to do their dutytake care of their responsibilities, such as doing homework, going to school, help youand helping their parents. Because they don't want to take care of their responsibilities, such as doing homework, going to school, and helping their parents.

First, I would combine the two sentences. "This situation is very dangerous, because they don't want to take care of their responsibilities, such as doing homework, going to school, and helping their parents." I would use the word 'duty' for things you do at work. Things people do at home or in their personal lives I consider 'responsibilities'. I changed the present tense verbs to present participle (-ing) because since they are the subject's responsibilities, they are continuous. I changed helping your parents to helping their parents, because you used 'they' before.

Bbecause then they don't want to dofulfil their dutyies such as doing homework, going to school, or help youing their parents. because then they don't want to fulfil their duties such as doing homework, going to school, or helping their parents.

BThis is because they don't want to do their dutyimportant things such as do homework, going to school, help youand helping their parents. This is because they don't want to do important things such as homework, going to school, and helping their parents.

Try not to start a sentence with “because”. Instead, say “this is because”. Alternatively, you can put a comma at the end of your previous sentence like this: “This is very dangerous, because they don’t want to ...”

Additionally, they don't want to play real games with friends. Additionally, they don't want to play real games with friends.

Additionally, they don't want to play real games with friends. Additionally, they don't want to play real games with friends.

Additionally they don't want to play real games with friends. Additionally they don't want to play real games with friends.

That's soWith so much time spent playing video games, children's social communication skills may weaken. With so much time spent playing video games, children's social communication skills may weaken.

That's so children'seir social communication skills may weaken. Their social communication skills may weaken.

That's sois means that children's social communication skills may weaken. This means that children's social communication skills may weaken.

Use “that’s so” when you’re giving a reason for doing something. In this case, you’re trying to give an explanation, so say “this means that”.

Consequently, their parents should limit their time spent playing video games. Consequently, their parents should limit their time spent playing video games.

This is grammatically correct. But to make your writing sound smoother, I would combine the two sentences and use therefore instead of consequently. "Children don't have a self-control mechanism, therefore, their parents should limit their time spent playing video games."