Educational Toy: This 3D Unlock Interlock Puzzle Is An Ideal Educational Toy That Can Train Thinking Ability And Improve Spatial Imagination. Durable Material: Made Of Durable Wooden Material, Unlock Interlock Puzzle Toy Offers A Comfortable Touch And Strong Durability For Long Term Use. Fun Puzzle: The Brain Teaser Puzzle Design Can Help You Find Joy Your Busy Work Schedule. Creative Design: The Square Block Design Of The Challenge Lock Toy Allows For Countless Ways Of Assembly, Stimulating Your Innovative Thinking. Compact Size: With Product Dimensions Of 7.7Cmx7.7Cmx7.7Cm/3.03Inchx3.03Inchx3.03Inch, This Mind Game Puzzle Set Can Be Played With ,Making It The Companion For Travel Or Office Use.