You can download a kid-friendly game software system at Kidthing and try it out by playing the free Mathketball game (simple addition from 0 to 6). My 3-yr. old enjoyed the two demos, they both go through the first four letters of the alphabet, one with bugs and one with animals. Something new I thought your kids might get a kick out of! Of course they offer a long list of games you can purchase too, but I wanted to make sure you utilized the freebie part of it first.
You’ll find more free mom resources here.