War is a very scary and dangerous thing that happens when people can't agree on things and start fighting. When there's a war, lots of people get hurt or even die, and that's really sad and scary.
Children who live in places where there's a war happening can be affected in many ways. They might not have enough food or clean water to drink, and they might not be able to go to school or play outside like they normally would. They might have to leave their homes and families to stay safe, which can be really scary and confusing.
Even worse, children can get hurt or killed in the war itself. Sometimes bombs or guns can hurt them, and they might not be able to get the help they need because the doctors and hospitals are busy taking care of other people who've been hurt too.
All of these things can make children feel really scared, sad, or even angry. They might have nightmares or feel like they can't trust the people around them. Everything feels unsafe and uncertain, and that can be really hard to deal with.
It's important for grown-ups to try to protect children as much as possible during a war, and to give them love and support to help them feel safe and loved. But even with all that, war can leave scars on children that can last a long time. That's why it's so important that we do everything we can to prevent wars from happening in the first place.