Brain Teaser Puzzles Wood Blue This is suit for both children and adult. A unique and special wooden brain teaser puzzle. The lock may look simple, but it contains lots of mysteries. It is usually easy to take apart and difficult to reassemble. Not only it can enhance your ability, and can even be an extraordinary plan! The ancient Chinese wisdom, old ancestral locks, you can do it in a second, others may a hour, or even a day also couldn't do it. Pls make sure the the children , Please do not eat the toy parts