This is the SmartNotebook file that I use with my elementary art students at cleanup time. There is a timer (a bomb) that counts down however many second are set and then "explodes." There is also a scoreboard for each class. Every time they are cleaned up and seated before the bomb explodes they get a point. If not, I get a point. This year I had a popcorn party at the end of the year for all classes with more points than me. I think next year I may give smaller prizes when they reach 10 points. I have also included slides with fun ways to line the kids up: coin toss, vowel dice (kids that have that letter in their name can line up), and color chooser (kids wearing that color can line up), and a color wheel.