I got this original idea from the blog First Grader At Last! http://firstgraderatlast.blogspot.com/2010/10/spooky-shake-up.html
Since then I have made a similar Wintery Shake-Up and now Spring Shake-Up.
I used egg cartons and flower erasers for the game. I also put some extra flower erasers in a cute container to use as counters.
Put 2 erasers inside of the egg carton and write numbers on each hole. Students shake the egg carton and open to see what 2 numbers the erasers landed on. Then they add or subtract the 2 numbers.
Spring Shake-Up Egg Carton Label
Spring Shake-Up Recording Sheet