The ROKR Siege Heavy Ballista Epic War DIY wooden puzzle model is a challenging and intricate 3D puzzle suitable for ages 14 and up. With 142 pieces made of wood, this model allows DIY enthusiasts to create a replica of a heavy ballista epic war machine.  Simulate the operation of a siege ballista. Uses real mechanial gears and a quadruple elastic mechanism. Fire 3 Blunt Arrows. Perfect for history buffs and puzzle lovers, this product offers a unique and immersive building experience. Made in China by the brand ROKR, this puzzle is sure to provide hours of entertainment and satisfaction upon completion.