13%20colorful%20shapes…%20Dozens%20of%20spatial%20challenges!%20Spill%20out%20the%20shapes%20and%20then%20try%20to%20fit%20them%20all%20back%20into%20the%20tray.%20Then%20use%20them%20to%20build%2020%20different%20objects.%20And%20for%20the%20ultimate%20challenge%2C%20construct%20a%203-D%20cube!%20Hours%20of%20entertainment%20with%20this%20unique%203-in-1%20puzzle.Contents13%20GEObrix1%20challenge%20guide