Fold, click, and solve! Arrange 16 linked gears to match 40 colorful or black-and-white challenge cards across 4 difficulty levels. Great for kids and adults alike.  This satisfying fidget puzzle boosts spatial reasoning and critical thinking. Made from high-quality, materials without BPA, it’s compact at 14" long—perfect for travel.  A brain teaser, logic puzzle, and sensory toy all in one!
 
Ages 6+