mischief

The little boy's eyes twinkled with mischief as he hid his sister's favorite doll.

(Chinese) 那个小男孩藏起妹妹最喜欢的娃娃时，眼睛里闪烁着调皮的光芒。

The kittens got into all sorts of mischief while their owner was at work.

(Chinese) 小猫们在主人上班时胡闹，惹出了各种各样的小麻烦。