This idea is one that I used with my 4th graders. It was an incentive idea that I used as part of my reward system for completing a certain number of logic puzzles. If students correctly solved a set number of logic puzzles they would get to use one of the teacher's fun pens for the day! They loved picking out a pen and using it on all their classroom work (except penmanship). This idea could be used as an incentive for anything you choose. You could use it for a reward for good behavior, as a reward for receiving a certain grade or improving on a test, and so on. I tried to pick pens that weren't too distracting! My mom bought me a pack of those pens that have games on them but I thought those would be WAY too distracting so I didn't include them in my "Fun Teacher Pens" collection.
Use the element of surprise when teaching! Students love surprises! As teachers, it can be hard to come up with new exciting ideas for lessons each day and we can quickly fall into the "same 'ole" routines. Don't get me wrong, routines can be/are a good thing but why not add some "fun" and "surprises" to your routines? These don't have to be anything big. I found that my 4th graders loved visuals so if I just brought in a new object to introduce a lesson they got excited. When I taught a unit on seeds I would wear a necklace and earrings made out of seeds and see if my students could guess what we were going to be studying.
Introducing a new novel? You could...introduce the new book by saying, "Okay class, today we are going to start a new book, "Mr. Popper's Penguins." OR... "Boys and girls we have a special visitor today who is going to reveal the next book we will be reading!" Then take out the "Book Monster" and have students ask him questions about the book. "Is it fiction or non-fiction?" "Is it about animals?" You could have your "Book Monster" talk or just whisper the answer to you which you then reveal to your class. OR give students clues and see if they can guess the book. If you're wondering, a friend made me one of these for each of my kids. They are called "pajama eaters" and you can find a tutorial on how to make them here.