There are some online stores for software at reduced prices. The site I used to use is apparently out of business though - as I was looking for the link and found it didn't bring up what I expected....

Best Buy and Office Max sometimes have good prices too.

Carmen Sandiego Math Detective was a big hit for DS - although I think his version was old and wouldn't run under XP.

There is also a ClueFInders math program.

Mary

Mary