I couldn't find a demo and had emailed asking for one. Finally gave up. btw, we have Vista and it works fine. Too bad it didn't work on your computer.

DS has been playing all morning. I have to be around to help him go through the math or he wouldn't do it and there appears to be no penalty for wrong answers (he's not one to bother with the explanations and is happy to just click on everything until he gets it right). Still, this morning we've already (willingly) reviewed GCF, LCM, commutative and distributive properties and more. Looking at the website, you can click on topics covered in the various levels. There is math evolver game on Amazon for $19 which has 15 levels. I'd suggest emailing the company and asking what the difference is. I've got to wonder what the extra $50 buys you.