It's a 3-D puzzle and a building set in one! This follow-up to the best-selling, award-winning Mental Blox game is specially made for younger players. Kids as young as 4 will love solving 28 puzzle challenges by stacking the colorful, engaging blocks into the right combinations. The perfect way to encourage early development of critical thinking and logic skills. , , Includes:, Activity cards to guide the play, puzzle tray, 8 puzzle pieces (4 cubes, 4 shapes), 28 double-sided puzzle cards and activity guide