If you are considering buying either a Mind Station or any Leap Frog game that uses the rewritable cartridges please be aware that Leap Frog will no longer be supporting these products after January 01, 2008.

Update:  There is no longer any material other than printable pages.  They have removed all of the audio files and turbo twist products.

I would simply recommend not using these anymore.  If you have any .lbk files you can still write them to the cartridge but there is no longer any way to make your own spelling lists since that was all encrypted with a proprietary code on the Leapfrog server.