But if most kids used their LeapsterGS the way I used mine, they'll be playing with it on the go, in the car and on vacations where the home computer isn't handy.
Since we're hard pressed to think of a scenario where having a calculator and card reader on hand would be essential to your well being -- especially considering that handy "Calculator" app that comes pre-loaded on most every computer these days -- it's difficult to postulate when this awkward combination of gadgets would actually come in handy.