The Fun Game of Logical Deduction! Give your mind a workout with GridWorks, the go-anywhere, multichallenge game of logical deduction. GridWorks is the ultimate mind game, featuring 60 multi-dimensional challenges. The object of the game is to break the code with logic and deductive reasoning using the positive and negative visual clues in each color and pattern-matching challenge. Players will have fun solving their way from Warm-up to Expert Level. GridWorks’ compact spiral-bound design with magnetic pieces makes it ideal for travel. Ages 8 to Adult. Availability: Usually ships in 2-3 business days. 1520TF FREE GROUND SHIPPING ON ALL ORDERS OVER $75.00. Please entry FREESHIPPING in the coupon box on the second page of the checkout. Offer valid for the 48 contiguous states. Certain oversize and drop ship items are excluded.