During the 100th day festivities in my class, I set up many fun 100th day centers. To add suspense, students are not allowed to begin these fun centers until they have earned their "admission ticket." This admission ticket is handed out once we have finished our 100th day morning meeting and calendar time. Students are allowed to work at their pace and choose their 100th day centers. I have a limit of 3 students per center. As they finish the centers, I place a sticker on the admission ticket over the finished center. The goal is to complete each of the centers by the end of the 100th day. This makes for a very fun, carnival-style 100th day!