<br>How to open the puzzle box?<br> <br>Test your intelligence while having fun by unlocking this thought. Knocking one of the corner (need you to find which corner ), the box will open. Then knocking the same place, it will close.<br> <br>It will be a more diverting toy to kill time than sleeping or surfing online. You might not open the puzzle box unless you know the trick. If you fail to open it for the first time, be patient and try a few more times. <br> <br>Just give the puzzle box as the a gift to the beloved. It will be a surprise and make they love it so much. Play the puzzle box with children, family or friends, cherish the time spending with them, it will be valuable treasure in your life. <br>