We are lucky to be able to sign out computer games through our local library, so ds has tried a whole bunch of them. (Makes it much easier to decide which ones to buy!) He's doing first grade math, and Jumpstart first grade is definitely his favorite of what we've tried. It covers more than just math, but it seems like he likes the math games the most. He also likes Reader Rabbit first grade (Capers on Cloud Nine). He found Math Blaster 1st grade to be boring (which is a bummer, since I bought that one because our library didn't have it). We're on the waiting list for Millie's Math House through our library, which I'm thinking he'll enjoy since he enjoyed playing Trudy's Time House in the same series.