Brand New in the Box! Robotime 3D Jigsaw Puzzle Construction Set DIY Mechanical Model Build Kit 3D Laser Cut Woodcraft Model Making Puzzle Challenge Gift Set for Adult and Teens (Air Vehicle) FEATURES: ~ Quality Self Propelled Clockwork Wooden Puzzle - The laser-cut technology enables the piece operates with its clever mechanical clockwork operation. Hand crafted by the finest master craftsmen using only time-honoured traditional methods and techniques ~ Made with non toxic, environmental friendly plywood ~ These 3D wooden Mechanical Clockwork Puzzles require minimum of 4 hours of DIY full of fun. The puzzle activities have been scientifically proven to improve memory, relieving stress, improve visual-spatial reasoning skills and increase IQ. ~ All pieces are pre-cut, easy to pop out, all you needed is time and patience, putting them together one by one following the instruction, you will enjoy every steps of making this amazing puzzle GREAT ITEM AT A GREAT PRICE!!