Build a lovely Treasure Box with this 3D puzzle containing 190 pieces of Ugears Whether you are a collector or just want to decorate your home, this highly detailed model is perfect. Ugears designs and manufactures unique self-assembly mechanical models without glue and made entirely of high quality wood. This is an original gift for any occasion To open the box, you will need to take out the key discreetly integrated in the lid by turning it slightly clockwise. Then insert it into the front of the box by turning the key counterclockwise so that the lid lifts off gradually. You can use your secret box to store jewelry, notes, or even small objects. Dimensions: 14.2 x 14.2 x 9.1 cm. From 14 years old. Assembly: 4 to 5 hours. Instruction booklet included.