New generation of mechanical gravity puzzles, not Rubik. Those puzzles have been presented at International Toy Fairs and have impressed many people. The gravity puzzles are based on a mathematical concept, which allows different shapes to be used (not necessarily pyramids) with other non-gravity mechanisms. For more information, please visit http://www.mindstratpuzzles.com
New generation of mechanical gravity puzzles, not Rubik. Those puzzles have been presented at International Toy Fairs and have impressed many people. The gravity puzzles are based on a mathematical concept, which allows different shapes to be used...