brain teaser puzzles Educational Wood Toys WY0113 Yolk Kong Ming Lock Game Brainteaser Wisdom Challenge Intellectual Training Creative Thinking IQ Magic WY0113 Yolk Kong Ming Lock Size(Aprox.): 7 x 5 x 5cm (2 3/4"x1 31/32"x1 31/32") Intelligence game ,great challenge for kids and adults Age 6+ There are hundreds of different puzzle toys on my store. If you like my store, please add to your favorite. Thank You.