Some teachers regularly try to bribe students into behaving with the promise of parties or other kinds of rewards. This is a bad idea. Even if it works, you are still training your students to expect a reward for everything they do.
Students should learn that there are sometimes things that they just have to do or face consequences. You don't get an ice cream cone when you drive the speed limit. But you will get a ticket if you go over it.
Don't reward students for doing what they were supposed to do in the first place. A fun reward or activity every now and then isn't going to hurt anything, just don't rely on this strategy as your central method of classroom management.