I had one of these when I was little, and wanted my son to have one.  He is in Kindergarten and they are working hard on math currently. I absolutely love this toy/learning machine, but I wish the numbers below were easier to see.  When you push the buttons down the numbers are really faint below.  We both have 20/20 vision, but often are squinting to see the answers.  Regardless, I think it still serves its purpose.