I bought these paper cups from the store for Megan to use for playing with and stacking but they did not stack so well, so they became this really fun game. We mounted them onto a box lid so that they would not tip. And we had about 30 little white plastic balls that went along with a air gun Todd's mom gave us a while back. The two went together perfect.
The cups are arranged kind of like skeeball. I did the numbers by 5's. They are learning without relizing it. We set up a bunch of our all rules and how to plays. The kids keep score and have to add up there score. The 5's makes the adding pretty simple for them.