The perfect gift for the ultimate puzzler! Know what MC2 equals? then try your hand at this extremely challenging puzzle with thousands of combinations with only one solution! Einstien² Genius Jigsaw Puzzle is a fiendishly tricky puzzle where they will need to solve the mathematical equations to match the correct answer to create a hexagonal jigsaw. This puzzle provides a perfect cerebral workout with three levels of difficulty to even tax a genius! Suitable for age 14 years and over.