mischief

Mischief is playful and often troublesome behavior, especially by children or young people.

When we use the word "mischief", we usually think of someone getting into trouble on purpose. It can be something silly like pulling a prank on a friend or playing a harmless trick on a family member. But sometimes mischief can also mean doing something naughty or destructive that gets you in real trouble, like damaging property or breaking rules. The key is that the person doing it usually knows they shouldn't be getting away with it. If someone says "the kids were up to their usual mischief last night", they probably mean that the children were being a bit naughty and causing some problems.