Assault is when someone hurts or tries to hurt another person on purpose. It is wrong to hurt other people and it is against the law. It is like when someone takes away your toy without asking, but much, much worse.
Sometimes people hit, push, kick or slap others because they are angry or upset. Sometimes they do it because they want something that the other person has, like a toy or a snack. But no matter what the reason is, it is always wrong to hurt someone else.
If someone hurts you or someone you know, it is important to tell a grown-up right away. The grown-up can help you and make sure that you are safe. It is also important to remember that hurting others is never okay and we should always try to be kind and gentle towards one another.