(Smart Games $19.99) An elegant brainteaser for teens and adults. The black circular board comes with a rainbow of pieces -- each has a different shape and includes spheres in three different sizes. The game play is simple but challenging. In each of the 120 challenges you are told which pieces to start with on the board. The challenge is to then fit the remaining pieces on the board so that all are used. The level of difficulty increases as you go through the book. Designed