[Product Information]

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• HIGH QUALITY AND SAFE MATERIALS: Sturdy and premium-grade stainless steel， diameter is 4.5mm when other competitors using cheap 3.5mm， so you can't 'cheat' by forcing them open， always keep the shape from bending and breaking. Doesn't have sharp edges to keep you and your children safe.
• EXCELLENT AND INTERESTING: A fun way to develop kids' critical thinking and challenge adults' minds， helps with practicing concentration and focus.
• GREAT STORAGE AND PERFECT SIZE: Each puzzle measures 3 x 2.54 inches that is suitable for you and your children. A thick drawer box package design with one unit for each puzzle makes the puzzles easy to access and store.
• CAN'T FIGURE OUT HOW TO SOLVE EACH BRAINTEASER? Instructions are provided along with a picture diagram. It will show you how the pieces are actually suppose to go and they work like magic!
• FUN WAY TO PASS THE TIME: A great way to pass time while waiting， during long drives or just bonding with the family.