Creating structures and ball run contraptions with KEVA Maple planks from MindWare is not only fun but educational. Builders gain the first-hand experience with balance, leverage, geometry and the principles of physics every time they design, stack, adjust and construct. Build an entire city or an enormous skyscraper, create castles complete with stairs and turrets... or construct a ball run with slides, black holes, bounce plates and more. Your imagination is the only limit to what can be created with KEVA Maple planks. Proudly made and assembled in the USA, our richly grained durable maple planks are not only beautiful but designed to provide years of monumental building fun. The Benefits of KEVA Maple: More durable and last longer; Made from a higher quality wood; Made in the USA; Includes full instructions from KEVA Contraptions and Structures sets. Includes 400 Maple Panks, 2 KEVA Balls, Full-Color Guide Book Recommended for ages 5+ WARNING: CHOKING HAZARD: Small Parts: Not for Children under 3 years Domestic Product Specifications 12.5 in L x 9 in W x 12.25 in H Material & Care Plastic Spot clean only