Educational Card Game - MindTrap Geometrical Riddles - Math Brain Teasers - Master Level Train your brain with MindTrap Geometrical Riddles Master Level. This brain games' stimulating assortment of pattern recognition problems, geometrical puzzles and mathematical riddles will exercise your brain while tickling your funny bone. In the twisted world of MindTrap, it's not what you know that counts, it's how you think Once you've mastered these brain teasers and riddles, you can challenge yourself to the next level... Ages 12 and Up, For 1 or More Players.