Color Sudoku Center materials are available at this link to my TPT store.
This is an easy math center to set up. It promotes critical thinking, mathematical logic, and solving for variables. I provide the instructions and simplified grids in my TPT download. You provide cubes or cut up paint chips for students to fill in the grids with. This version is pdf so you can just print and go! We love this center in our elementary school library!
You can buy a pre-made wooden color sudoku set from Amazon for around $30, if you don't want to make your own.