My First Math Adventure: Adding & Subtracting 1.1

My first grade boy (age 6) loves this little program. It works exactly the way the promo information says it does. I'll be looking for similar material for Vocabulary, Science and other subjects.

I have tried multiple times to install this program on my son's HP computer running Windows XP. However, it will not play. Error message says the sound software either has not been installed, or the sound card is missing -- both of which are wrong in this instance. The program is old enough that it does not recognize the newer sound card. Really intended to run on a much older Win 95 machine.