Last Updated: 7/26/18
This game is appropriate for grade school level students. It requires students to practice counting (1-5), remember their counts, and then perform basic addition or multiplication. The hardware is a very basic circuit that would be good for beginners. The code is written in scratch, so it will be easy for older grade school children to modify or build on their own.
The presentation material and the code can be downloaded at Scratch Addition Math Game.