Get a regular egg carton and write one number in each cup. Place two buttons in the egg carton and close it up.
There should be one egg carton for each pair or small group of students. Each student takes a turn to shake the egg carton, open it, and see what numbers the buttons are on. They must multiply those numbers together. The answer to the multiplication problem is their score. Play until one player reaches 500, then start over. :)