Even though I am a high school math teacher, I have several different versions of this game. This is one I use at the very beginning of a course as a quick activity or when I need to fill a few minutes with something light and fun. This would be an ideal activity for practicing basic math facts in elementary up into middle school.
To play, each student gets a card or two depending on the size of the class. The student with #1 reads his card and the student who has the answer to the question reads his card. Eventually all of the numbers are used and the game winds up back at #1.
I would suggest printing these on card stock and possibly laminating them for durability.