The genius of this Windows-only program is that it turns sophisticated mathematical concepts into engrossing activities. We played a game called "Boolie Boggle" endlessly--Boolies either smile or frown, and in this game, the object is to change frowns into smiles by bumping Boolies with pinballs. Pretty easy until you start getting chains of Boolies and chains of pinballs. Soon your mind is throbbing as you try to figure out what a sequence of three pinballs will do to two frowning Boolies. "Binary addition" sounds pretty intimidating, but that's exactly what "Boolie Boggle" is teaching. "Algebraic thinking" and "information-age maths" are among the other things this program teaches--mercifully, it manages it with little creatures and 3-D mazes instead of formulas and numbers.

As this journey unfolds, members of the search party drop off due to mismatched noses, wrong path choices and other errors. Fortunately, there is a practice mode where kids can play the games without sacrificing their Zoombini friends. Puzzles change elements, so there's no way to "learn" a level then repeat it by rote. There is also a very thorough parents' guide, which is helpful for parents who have, err, forgotten about binary numbers. Zoombinis Mountain Rescue is a gentle, yet challenging program that will probably even work its subtle magic on maths-phobes. --Anne Erickson