Blovec Impossible Dovetail Box Wooden Puzzle Brain Teaser Magic Drawers Gift Secret Compartment Brain Game for Adults

Smooth Surface: Sustainable wood with environmentally friendly paints material, and lightweight and comfortable in the hand, innocuous to human and environment. Teaching the fun of the world with this small wood early learn threading block. Test your intellect while having fun by unlocking this thought. Knocking one of the corner(need you to find which corner),the box wll open. Then knocking the same place, it will close. Suitable for family and friends.A great gift for people who love brainteasers and trick puzzles. THE HIDDEN SPACE SIZE: 1.96 x 1.96 x 0.51inch. PLEASE CHECK THE SIZE YOU NEED. The product measures 3x 3 x 2inches / 7.6 x 7.6 x 5cm.